Commonly Used Acronyms

These acronyms are commonly referred to in documents and other communications within Tulare County Association of Government's (TCAG) functions as a Metropolitan Planning Organization (MPO), Regional Transportation Planning Agency (RTPA), and Council of Governments (COG).




Continuing, Cooperative, and Comprehensive planning


Education, Enforcement, and Encouragement (Safe Routes to Schools program)


Resurfacing, Restoration, and Rehabilitation work


Resurfacing, Restoration, Rehabilitation, and Reconstruction


Army Corps of Engineers permit for waterway dredging or filling




Affirmative Action


American Academy of Environmental Engineers


Affirmative Action and Equal Opportunity


Asphalt Aggregate Mixture Analysis System


Arterial Analysis Package


Agency Action Request


American Association of Retired Persons


American Association of State Highway Officials


Average Annual Daily Traffic (two-way)


Average Annual Daily Truck Traffic


Aggregate Base; or, California Assembly Bill

AB 32 2006, Global Warming Solutions Act

AB 69

Created Regional Transportation Planning Agencies

AB 140

1988, Deddeh Act

AB 402

1977, California Transportation Reform Act

AB 872

1999, Regional and local transportation project funds

AB 1012

1999, Transportation project delivery and management

AB 1475

Safe Routes to School Program

AB 2928

2000, Traffic Congestion Relief Act

AB 3929

Transportation Enhancement Relief Act


Appropriated Budget Authority


Association of Bay Area Governments


Accreditation Board for Engineering and Technology


Air Blown Mortar


Area Bridge Maintenance Engineer


Acrylonitrile-Butadiene-Styrene; or
Antilock Braking System


Advance Construction


Abatement and Control


Asphalt Concrete Base


Alamont Commuter Express; Rail Program – Stockton to San Jose


Advisory Council on Historic Preservation


American Concrete Institute


Army Corps of Engineers


Asphalt Concrete Pavement; or
Asbestos Cement Pipe


American Concrete Pavement Association


American Concrete Pressure Pipe Association


Allocation Change Request


Automated Capital Spending Plan


Alameda County Transportation Authority


Actual Cost of Work Performed


Americans with Disabilities Act; or
Advance Deposit Application (for local program reimbursements)


Americans with Disabilities Act Accessibility Guidelines


Advanced Driver Information System


Arrow Diagramming Method


Archived Data Management Subsystem (Intelligent Transportation Systems)


Alternative Dispute Resolution


Administrative Service Center


Average Daily Traffic


Archived Data User Service (Intelligent Transportation System)


Area Engineer


Architectural and Engineering


Associated Equipment Distributors


Acoustic Emission Monitoring


Association of Environmental Professionals


Architecture Flow Diagram


Animal Feeding Operation


American Farmland Trust


Association of General Contractors


Automated Guideway Transit


Automatic Highway Advisory Radio


Automated Highway System; or
Average Highway Speed


Artificial Intelligence; or
Active ingredient; or
Asphalt Institute


American Institute of Architects


American Indian Advisory Council


Architectural Inventory/Evaluation form



Architecture Interconnect Diagram (Intelligent Transportation System)


American Industrial Health Association


Agency Information Management Strategy (Traffic Management System)


American Institute of Planners


Aerometric Information Retrieval System


Algebraic Oriented Language


Automated Location and Design System


Acceptable Level; or
regulatory Action Level (water quality)


Annual Leave Program


Amplitude Modulation; or
Anti Meridian


Association of Monterey County Bay Area Governments


America’s Missing: Broadcast Emergency Response


Alternative Motor Fuels Act


Automated Management Information System


Advanced Mobile Phone System (Intelligent Transportation System)


Advanced Notice of Proposed Rule Making


American National Standards Institute


Arctic National Wildlife Refuge (Alaska)


Agency Object 






Asphalt Pavement Alliance


Area of Potential Effect


Air Pollution Control District


Advance Project Development Element


Automated Procedures for Engineering Consultants


Area of Potential Environmental Impact


American Public Health Association


Area Project Managers; or
Assistant Project Manager


Assessor’s Parcel Number


Asphalt Recycling and Reclamation Association


Advance Planning Study; or
Accessible Pedestrian Signals


Asian-Pacific State Employees Association


Accelerated Pavement Testing


American Public Transit Association


Advanced Public Transportation System (Intelligent Transportation System


Auxiliary Power Units


American Public Works Association


Air Quality Control Program


Air Quality Control Region


Air Quality Index


Air-Quality maintenance Area


Air Quality Management District


Air Quality Management Plan


Automatic Road Analyzer


Air Resources Board


Attainment Regulations


American Railway Engineering Association


Asphalt-Rubber Hot Mix


Asphalt-Rubber Hot Mix – Gap Graded


Air Resources Management

ARRA 2009, American Recovery and Reinvestment Act


American Road and Transportation Builders Association


Advanced Rural Transportation Systems


Aggregate Subbase


As Soon As Possible


Administrative Services Center; or
Accounting Services Center; or
Agricultural Services Center


American Society of Civil Engineers


American Standard Code of Informational Interchange


Automotive Safety Foundation


American Society of Heating, Refrigeration, and Air-Conditioning Engineers


Acceleration and Severity Index


American Society of Mechanical Engineers


American Society for Nondestructive Testing


Automated Telephone Answering System


Archaeological Survey Report; or
Alkali-Silica Reactivity


Aluminum Spiral Rib Pipe


Acceptance Samples and Tests


American Society for Testing Materials


American Trucking Association


Active Transportation Advisory Committee


Advanced Traveler Information Systems


Advanced Traffic Management Systems


Active Transportation Program Plan


Asphalt Treated Permeable Base


Automated Traffic Surveillance and Control System


Advanced Transportation System Development


American Traffic Safety Services Association


All-Terrain Vehicle


Animal Unit


Abandoned Vehicle Abatement


Automatic Vehicle Control Systems


Advanced Vehicle Control Systems (Intelligent Transportation System)


Automated Vehicle Identification


Authorized Vehicle Lane; or
Automated Vehicle Locations (Intelligent Transportation System)


Automated Vehicle Operation (Intelligent Transportation System)


Average Vehicle Ridership


American Water Resources Association


Alternate Work Schedule; or
American Welding Society


Average Weekday Traffic


American Water Works Association




Budget at Completion


Best Available Control Measures


Best Available Control Technology


Best Available Demonstrated Technology


Bridge Approach Guard Rail


Basic Arterial Local Intersection


Bid Analysis and Management System


Basic Asphalt Recycling Manual


Bay Area Rapid Transit


Bridge Approach Slab


Black Advocates in State Service


Beginners All Purpose Symbolic Instruction Code


Best Available Technology; or
Bureau of Apprenticeship and Training (Department of Labor)


Beginning of Bridge


Bulletin Board System; or
Battery Backup System


Beginning of Curve


Benefit Cost Analysis


Thin-Bonded Concrete Overlay


Budget Change Proposal


Begin Curb Return


Breakaway Cable Terminal


Budgeted Cost of Work Performed


Budgeted Cost of Work Scheduled


1990, Budget Enforcement Act


Broad Emergency Assistance Radio System


Basic Engineering Estimating System


Business Enterprise Program


Bridge Evaluation Report


Brominated Flame Retardants


Business, Housing, and Transportation Agency

BIA Bureau of Indian Affairs; or
Building Industry Association
BIOS Basic Input/Operating System
BIR Bridge Inspection Report
BIT Binary Digit
BLA Bicycle Lane Account program (State)
BLM Bureau of Land Management
BMP Best Management Practice
BMS Bridge Management System
BNF Backus-Naur Form (Intelligent Transportation System)
BNSF Burlington Northern Santa Fe (Railroad)
BO Budget Obligations; or
Biological Opinion
BOD Biochemical Oxygen Demand; or
Biological Oxygen Demand
BOD5 Biochemical Oxygen Demand
BSO Building, Structures, and Obstruction report (Historic Properties Survey Report)
BP Before Present; or
Boiling Point
BPM Beginning Post Mile. Zero at south or west County line.
BPR Business Process Review; or
Bureau of Public Roads
BRT Bus Rapid Transit (Intelligent Transit System)
BSR Beginning of Slope Rounding
BSW Back of Sidewalk
BTA Bicycle Transportation Account
BT&H Business, Transportation, and Housing Authority
BTOS Basic Traffic Operations System
BTS Bureau of Transportation Statistics
BUN Blood Urea Nitrogen
BVC Begin Vertical Curve
BW Barbed Wire
BWF Barbed Wire Fence


CAA 1970, Federal Clean Air Act; or
Cable Anchor Assembly
CAAA 1990, Clean Air Act Amendment
CA Contract Authority; or
Certification Acceptance
CAATS California Alliance for Advanced Transportation Systems
CAC California Administrative Code; or
Citizens Advisory Committee
CAD Computer-Aided Drafting
CADD Computer-Aided Drafting and Design
CAER Community Awareness and Emergency Response
CAFO Concentrated Animal Feedlot; or
Consent Agreement/Final Order
CAG Citizens Advisory Group
CAH Controlled Access Highways
CALACT California Association for Coordinated Transportation
CALCOG California Association of Councils of Governments
CALTRANS California Department of Transportation
CALUP California Airport Land Use Plan
CASASFMRA California Association of Farm Managers and Rural Assessors
CALNET California Integrated Telecommunication System
Cal OES California Office of Emergency Services
Cal/OSHA California Office of Safety and Health Administration
CAM Caltrans Administrative Manual; or
Cooperative Agreement Manual
CAMP Continuous Air Monitoring Program
CANDE Culvert Analysis and Design
CAO Corrective Action Order
CAP Corrugated Aluminum Pipe; or
Certification Acceptance Plan; or
Corrective Action Plan; or
Control Account Plan; or
Cost Allocation Procedure; or
Criteria Air Pollutant
CAPA Corrugated Aluminum Pipe Arch
CAPM Capital Preventative Maintenance
CAQP Congestion and Air Quality Program
CAR Caltrans Action Request; or
Cooperative Agreement Report
CARB California Air Resources Board
CARS Caltrans Auxiliary Radio System
CAS Construction Area Signs
CASAC Clean Air Scientific Advisory Committee
CASE Computer Aided Software Engineering; or
Computer Aided Systems Engineering (Intelligent Transportation System)
CASP California Aviation System Plan; or
Corrugated Aluminized Steel Pipe
CAT EX Categorical Exemption (State); or
Categorical Exclusion (Federal)
CATIA Clean Air and Transportation Improvement Act
CaTNAP California Traffic Noise Analysis Protocol (
CATV Cable Television
CB Catch Basin; or
Citizens Band
CBA Cost Benefit Analysis
CBC California Bicycle Coalition; or
California Building Code
CBD Central Business District
CBO Congressional Budget Office
CBR California Bearing Ratio
CBTP Community Based Transportation Planning grants
CC Construction Complete
CCA California Coastal Act of 1976
CCAA California Clean Air Act
CCAPA California Chapter of the American Planning Association
CCB Change Control Board
CCC California Coastal Commission; or
California Conservation Corps
CCI Construction Cost Index
CCIC Central California Information Center
CCMP Comprehensive Conservation and Management Plan
CCO Contract Change Order
CCR California Code of Regulations
CCROC California Civil Rights Officers Council
CCS California Coordinate System; sor
Construction Control Survey
CCSFCC City-County-State-Federal Cooperation Council
CCTV Closed Circuit TV
CD Contract Delegation (Purchase Order)
CDC Centers for Disease Control
CDF California Department of Forestry
CDBG Community Development Block Grant
CDFG California Department of Fish and Game
CDH California Division of Highways
CDL California Drivers License
CDMA Code Division Multiple Access (Intelligent Transportation System)
CDPD Cellular Digital Packet Data (Intelligent Transportation System)
CD(PO) Contract Delegation (Purchase Order)
CE Categorical Exclusion (National Environmental Policy Act); or
Categorical Exemption (California Environmental Quality Act); or
Construction Engineering
CEA Career Executive Assignment (Appointment)
CEAC County Engineers Association of California; or
Caltrans Employment Advisory Committee
CEBC Clean Energy Business Conference
CEC California Energy Commission; or
Caltrans Encroachment Committee
CELSOC Consulting Engineers and Land Surveyors of California
CEMs Continuous Emissions Monitors
CEP Cumulative Exposure Project
CEQ Council of Environmental Quality (Federal Agency)
CEQA 1970, California Environmental Quality Act
CERCLA Comprehensive Environmental Response, Compensation and and Liability Act
CERES California Environmental Resources Evaluation System
CERF Civil Engineering Research Foundation
CERL Construction Engineering Research Laboratory
CESA California Endangered Species Act
CEU Continuing Education Unit
CFC Cost of Facilities Capital; or
CFDA Catalogue of Federal Domestic Assistance
CFM Chlorofluoromethane
CFR Code of Federal Regulations
CFRA 1992, California Family Rights Act
CFRP Carbon-Fiber Reinforced Plastic
CFS Cubic Feet per Second
CFU Colony Forming Unit (water quality)
C&G Curb and Gutter
CGP Construction General Permit (National Pollutant Discharge Elimination System)
CH4 Methane
CHIN California Highway Information Network 1-800-427-7623; 999;
CHP California Highway Patrol
CHSRA California High Speed Rail Authority
CIA Community Impact Assessment;
CIC Critical Intersection Control
CIDH Cast-In-Drilled Hole
CIMAC Caltrans Improves Mobility Across California
CIP Cold-In-Place (recycling of asphalt); or
Cast-In-Place cast iron pipe; or
Capital Improvement Program
CIPCP Cast-In-Place Concrete Pipe
CIR Council on Intergovernmental Relations
CIT California Institute of Technology
CITAB California Information Technology Advisory Board
CIU Controller Interface Unit
CIWMB California Integrated Waste Management Board
C&L Certification and Licensing
CLAS California Leave Accounting System
CLP Continuous Learning Program
CLUP Comprehensive Land Use Plan
CMA Congestion Management Agencies
CMAQ Congestion Mitigation and Air Quality
CMB Concrete Median Barrier
CMC Construction Metrication Council
CMP Congestion Management Program/Plan; or
Corridor Management Plan (Scenic Highways); or
Corrugated Metal Pipe
CMS Congestion Management System; or
Changeable Message Signs
CMSA Consolidated Metropolitan Statistical Area
CMV Commercial Motor Vehicles
CNDDB California Natural Diversity Data Base
CNG Compressed Natural Gas
CNLM Center for Natural Lands Management
CNPS California Native Plant Society (data base)
CO Carbon Monoxide
COB Close of Business
COBOL Common Business Oriented Language
COBRA Consolidated Omnibus Reconciliation Act
COC Citizens Oversight Committee
COCO Contractor-Owned/Contractor-Operated
COD Chemical Oxygen Demand
CODP Career Opportunity Development Program
COE Category of Expenditure (budgetary grouping); or
US Army Corps of Engineers
COFPAES Council on the Federal Procurement of Architectural and Engineering Services
COG Council of Governments (Local, see Local Transportation Agency)
COH Coefficient of Haze
COGO Coordinate Geometry
COL Collector (Urban)
COLT City Operated Local Transit (Porterville)
Congestion Reduced Speeds less that 35 MPH for longer than 15 minutes
COP Capital Outlay Projects
CORBA Common Object Request Broker Architecture (Intelligent Transportation System)
COS Capital Outlay Support; or
College of the Sequoias
COTR Contracting Officer Technical Representative (Intelligent Transportation System)
COZEEP Construction Zone Enhanced Enforcement Program/Patrol
CP Capital Projects
CPC Consolidated Planning Committee (Stanislaus Council of Governments)

Combined Pay Factor

CPFF Cost Plus Fixed Fee
CPH California Permit Handbook
CPI Cost Performance Index
CPIF Cost Plus Incentive Fee
CPM Critical Path Method
CPMC Capital Projects Management Council
CPR Cardio-Pulmonary Resuscitation
CPRC California Public Resources Code
CPSD Capital Project Skill Development
CPU Central Processing Unit
CPUC California Public Utilities Commission
CRAC Cold Recycled AC
CRAP Construction Records and Procedures
CRB Contract Review Board
CRCP Continuously Reinforced Concrete Pavement
CRDA Cooperative Research and Development Agreement
CRHP California Register of Historic Places
CRIP Cost Reduction Incentive Proposal
CRLF California Red Legged Frog
CRP Conservation Reserve Program; or
Combined Road Plans
CRSI Concrete Reinforcing Steel Institute
CRT Cathode Ray Tube
CRV California Redemption Value
CSAC California State Association of Counties; or
California Supervisors Association of California
CSD Context Sensitive Design
CCSEA California State Employees Association
CSHC California Streets & Highways Code
CSI Common Sense Initiative; or
Compliance Sampling Inspection
CSIP Corridor Safety Improvement Program
CSO Combined Sewer Overflow
CSP Corrugated Steel Pipe; or
Communication Service Provider (Intelligent Transportation System)
CSPA Corrugated Steel Pine Arch
CSRC California Special Reference Center (Global Positioning Technologies)
CSS Context Sensitive Solutions
CSTI California Specialized Training Institute
CSUS California State University, Stanislaus/Sacramento
CSWC Construction Storm Water Coordinator
CT Caltrans; or, Census Tract
CTAA Community Transportation Association of America
CTAP Cooperative Training Assistance Program (Federal)
CTB Cement Treated Base
CTC California Transportation Commission
CTE Center for Transportation and the Environment
CTO Compensatory Time Off
CTP California Transportation Plan
CTIFS California Transportation Infrastructure Funding System
CTIPS California Transportation Improvement Plan System
CTE Center for Transportation and the Environment
CTO Compensatory Time Off
CTP California Transportation Plan
CTIFS California Transportation Infrastructure Funding System
CTIPS California Transportation Improvement Plan System
CTIS California Transportation Investment Strategy
CTPB Cement Treated Permeable Base
CTR California Toxics Rule
C-TRIS California Transportation Research Information System (UCB)
CTS Commuter Transportation Services
CTSA Coordinated Service Transportation Agency
CUF Commercially Useful Function (Disadvantaged Business Enterprise)
CV Cost Variance
CVAS Commercial Vehicle Administration Subsystem (Intelligent Transportation System)
CVCS Commercial Vehicle Check Subsystem (Intelligent Transportation System)
CVHAS Cooperative Vehicle-Highway Automation Systems
CVISN Commercial Vehicle Information Systems and Networks (Intelligent Transportation System)
CVO Commercial Vehicle Operations (Intelligent Transportation System)
CVS Commercial Vehicle Subsystem (Intelligent Transportation System)
CWA Clean Water Act
CWD Corridor Wide Display System (Intelligent Transportation System)
CWNS Clean Water Needs Survey
CY Calendar Year
CYA California Youth Authority
CZMA Coastal Zone Management Act
CZARA Coastal Zone Act Reauthorization Amendments


DAB Digital Audio Broadcast (Intelligent Transportation System)
DAC Disability Advisory Council
DAF Damage Assessment Form
DAMP Drainage Analysis and Modeling Program
DAR Defense Access Roads
DART Dinuba Area Regional Transit
DARTS Dynamic Arterial Responsive Traffic Signal System
DAT Diagnostic Acceptance Testing
DATCOM Director's Advisory Team for Communication
DBA Doing Business As; or
Decibels "A" Scale
DBE Disadvantaged Business Enterprise
DBELO Disadvantaged Business Enterprise Liaison Officer
DBMS Data Base Management System
D/C Demand Capacity ratio
DCIU Discrimination Complaint Investigation Unit
DCP Dynamic Cone Penetrometer
DCS Data Collection System
DCU Discrimination Complaint Unit
DD District Director, Data Dictionary (Intelligent Transportation System)
DDC District Division Chief
DDD Deputy District Director
DDE Data Dictionary Element (Intelligent Transportation System)
DDT Dichlorodiphenyltrichloroethane 
DEB District Environmental Branch
DED Draft Environmental Document
DEIR Draft Environmental Impact Report (California Environmental Quality Act)
DEIS Draft Environmental Impact Statement (National Environmental Policy Act)
DEN Data Exchange Network (Intelligent Transportation System)

Division of Engineering Services; or

DF Douglas Fir
DFD Data Flow Diagram (Intelligent Transportation System)
DfE Design for the Environment
DFEH Department of Fair Employment and Housing (California)
DFG Department of Fish and Game (California)
DGAC Dense Graded Asphalt Concrete
DGAC(R) Dense Graded Asphalt Concrete (Rubberized)
DGPS Differential Global Positioning System (Intelligent Transportation System)
DGS Department of General Services
DHS Department of Health Services
DHHS Department of Health and Human Services (Federal)
DHV Design Hourly Volume
DI Drainage Inlet
DIB Design Information Bulletin
DIB 82 The Pedestrian Accessibility Guidelines for Highway Projects
DIP Diamond Interchange Program
DLAE District Local Assistance Engineer
DLR Detection Limit for Reporting (water quality)
DMBB Double Metal Beam Barrier
DME District Materials Engineer
DMR Discharge Monitoring Report
DMS Dynamic Message Sign (Intelligent Transportation System)
DMT Division of Mass Transportation
DMV Department of Motor Vehicles
DND Draft Negative Declaration
DOA Division of Aeronautics; or
Division of Accounting
DOC Department of Commerce (Federal)
DOD Department of Defense
DOE Department of Energy; or
District Office Engineer
DOF Department of Finance
DOJ Department of Justice (Federal)
DOL Department of Labor (Federal)
DLA Division of Local Assistance (Formerly Office of Local Programs)
DOL FOH Department of Labor Field Operations Handbook (Federal)
DOS Division of Structures; or
Disk Operating System
DOT Department of Transportation
DOTP Division of Transportation Planning
DPA Department of Personnel Administration
DPI Dots Per Inch
DPR Department of Parks and Recreation 
DRB Dispute Review Board
DRI Division of Research and Renovation
DRIM Draft Relocation Impact Memo
DRIS Draft Relocation Impact Study/Statement
DROA Departmental Restriction of Appointments
DSA Division of the State Architect; or
Disturbed Soil Area
DSB Donor State Bonus funds
DSC Division of Structure Construction
DSI Detailed Site Investigation
DSMP District System Management Plan
DSRC Dedicated Short Range Communications (Intelligent Transportation System)
DST Daylight Savings time
DSWC District Storm Water Coordinator
DTA Dynamic Traffic Assignment (Intelligent Transportation System)
DTAC Departmental Transportation Advisory Committee
DTBB Double Thrie Beam Barrier
DTIM Direct Travel Impact Model
DTM Digital Terrain Modeling
DTR Director's Tracking Report
DVAC District Value Analysis Coordinator
DVBE Disadvantaged Veteran Business Enterprise
DWEL Drinking Water Equivalent Level
DWNS Drinking Water Needs Survey
DWR Department of Water Resources
DWS Drinking Water Standard


EA Expenditure Authorization; or
Endangerment Assessment; or
Enforcement Agreement; or
Environmental Action; or
Environmental Assessment; or
Environmental Audit
EAC Estimate at Completion
EAP Employee Assistance Program; or
Environmental Action Plan
EAR Employee Action Report
EBL Eligible Bridge List
EC Environmental Coordinator; or
End Horizontal Curve; or
End Curve
ECPA Electronic Communications Privacy Act (Intelligent Transportation System)
ECR Engineering Cost Reporting System; or
End of Curb Return
ED Environmental Document
EDA Employee Development Appraisal; or
Environmental Document Approved
EDAPTS Efficient Development of Advanced Public Transportation Systems
EDI Electronic Data Interchange (Intelligent Transportation System)
EDM Electronic Distance Measuring
EDP Electronic Data Processing; or
Early Deployment Plan (Intelligent Transportation System)
EDW Effluent-Dominated Water
EEG Electroencephalogram
EEM Environmental Enhancement and Mitigation Program (California)
EEO Equal Employment Opportunity
EEOC Equal Employment Opportunity Commission
EEZ Exclusive Economic Zone
EF Early Finish
EFH Essential Fish Habitat
EFT Electronic Fund Transfer
EIR Environmental Impact Report (California Environmental Quality Act)
EIS Environmental Impact Statement (National Environmental Policy Act)
EIT Engineer-in-Training
EJ Environmental Justice
EKG Electrocardiogram
ELI Element Level Inspection (bridges)
EMC Event Mean Concentration (storm runoff); or
Emergency Management Center (Intelligent Transportation System)
EMFAC Emissions Factors Model
EMMS Emissions Management Subsystem (Intelligent Transportation System)
EMS Extinguishable Message Signs; or
Equipment Management Systems
EO Equal Opportunity; or
Executive Order
EOC Emergency Operations Center
EOG Education and Outreach Group
EOS Equivalent Opening Size (Geotextile Fabric); or
Edge of Shoulder
E&P Environmental and Permit
EPA Environmental Protection Agency
EPCRA Emergency Planning and Community Right-to-Know Act
EPI Economic Policy Institute
EPL Excluded Partial List (Disadvantaged Business Enterprise)
EPM Ending Post Mile
EPROM Erasable Programmable Read-Only Memory
ER Emergency Relief (Federal)
ERC Emergency Resource Center
ERISA Employee Retirement Income Security
ERNS Emergency Response Notification System
ERPP Ecosystem Restoration Program Plan (CALFED)
ES Early Start
ESA Endangered Species Act; or
Environmentally Sensitive Area
ESAL Equivalent Single Axle Load, 80 kN
ESC Engineering Services Center
ESMR Enhanced Specialized Mobile Radio (Intelligent Transportation System)
ESP Enhanced Services Program
ESR End of Slope rounding
ESU Evolutionary Significant Unit
ET Earliest Time of Completion
ETC Estimate to Complete; or
Electronic Toll Collection (Intelligent Transportation System)
ETBE Ethyl Tertiary Butyl Ether
ETS Emergency Telephone Services (Intelligent Transportation System)
ETTM Electronic Toll Collection and Traffic Management
ETW Edge of Traveled Way
EV Earned Value
EVC End Vertical Curve
EWRI Environmental and Water Resources Institute (American Society of Civil Engineers)
EXPEAR Expert System Pavement Evaluation and Rehabilitation
E-76 Authorization to Proceed Summary Form


FAA Federal Aviation Administration
FACTS Flexible Advanced Computer Traffic Signal System
FADS Federal Aid Data System
FAE Federal-Aid Eligibility Code
FAHP Federal Aid Highway Program
FAI Federal Aid Interstate
FAP Federal Aid Primary
FAPG Federal Aid Policy Guide
FAQ Frequently Asked Questions
FAR Federal Acquisition Regulations
FARA Federal Acquisition Reform Act
FARES First American Real Estate Solutions
FARS Fatal Accident Reporting System (Intelligent Transportation System)
FAS Federal Aid Secondary Funding
FAU Federal Aide Urban Funding
F&C Frame and Cover
F&G Frame and Grate
FCAA Federal Acquisition Reform Act
FCRTA Fresno County Rural Transit Agency
FCWA Federal Clean Water Act
FCR Flexible Congestion Relief program (State, discontinued)
FDR Full Depth Reclamation (of pavement)
FE Fund Estimate; or
Fugitive Emissions
FEBBS Federal Electronic Bulletin Board System
FED Final Environmental Document (Environmental Impact Statement, Negative Declaration, or Finding of No Significant Impact)
FEHA Fair Employment and Housing Act (California)
FEIN Federal Employer Identification Number
FEIR Final Environmental Impact Report (California Environmental Quality Act)
FEIS Final Environmental Impact Statement (National Environmental Policy Act)
FEMA Federal Emergency Management Agency
FERC Federal Energy Regulatory Commission
FES Flared End Section
FESA Federal Endangered Species Act
FF Free Float; or
Finish to Finish
FFA Future Farmers of America
FFGA Full Funding Grant Agreements
FFP Firm Fixed Price
FFS Fee For Service health plan
FFY Federal Fiscal Year (October 1 through September 30)
FHLMC Federal Home Loan Mortgage Corporation (Freddie Mac)
FHPM Federal Aid Highway Program Manual
FHWA Federal Highway Administration
FICA Federal Insurance Contributions Act
FIF Final Inspection Form
FIP Federal Implementation Plan
FIPS Federal Information Processing Standard (Intelligent Transportation System)
FIR Federal Indian Reservation
FIRM Federal Insurance Rate Maps (Flood Plains)
F/L Finance Letter
FLEP Forest Land Enhancement Program (US Forest Service)
FLHD Federal Land Highway Division
FLHP Federal Lands Highway Program
FLSA Fair Labor Standards Act
FM Function Manager
FMC Freeway Management Center (Intelligent Transportation System
FMCS Fleet Management and Control Systems
FMCSA Federal Motor Carrier Safety Administration
FMIS Federal Management Information System
FMLA Family and Medical Leave Act of 1993
FMMP Farmland Mapping and Monitoring Program
FMP Fishery Management Plan; or
File Maker Pro
FMS Fleet Management Subsystem (Intelligent Transportation System)
FMU Forest Management Unit
FMVSS Federal Motor Vehicle Safety Standards
FNMA Federal National Mortgage Association ("Fannie Mae")
FNM-76 Form to Federal Management Information System
FO Functionally Obsolete (bridge)
FOE Finding of Effect; or
Friends of the Earth
FOI Freedom of Information 
FOIA Freedom of Information Act
FONSI Finding of No Significant Impact (National Environmental Policy Act)
FOT Field Operational Test (Intelligent Transportation System)
FPA Fair Practices Act (subletting and subcontracting)
FPIF Fixed Price Incentive Fee
FPN Federal Project Number (Federal Aid Data System)
FPPA Farmland Protection Policy Act 1984
FPPP Facility Pollution Prevention Plans
FPR Final Program Review
FR Federal Register
FRA Federal Railroad Administration
FRIS Final Relocation Assistance Statement
FRM Federal Reference Method; or
Final Rule Making
FRO Federal Resources Offices
FRP Fiber Reinforced Polymer
F-SHRP Future Strategic Highway Research Program
FSOR Final Statement of Reasons
FS Finish to Start
FSA Flexible Spending Account Health Plan 
SFHCC Fast Setting Hydraulic Cement Concrete
FSP Freeway Service Patrol
FSR Feasibility Study Report; or
Financial Study Report
FSTIP Federal Statewide Transportation Improvement Program
FTA Federal Transit Administration
FTB Franchise Tax Board
FTE Focused Training Evaluation; or
Full-Time Employee
FTIP Federal Transportation Improvement Program
FTP File Transfer Protocol; or
Federal Test Procedures
FU Functional Unit
FVMSS Federal Motor Vehicle Safety Standards
FWD Falling Weight Deflectometer
FWPCA Federal Water Pollution Control Act
FWS Fish and Wildlife Service (Federal)
FY Fiscal Year


GAAP Generally Accepted Accounting Principles
GAO General Accounting Office
GAR Governor's Action Request
GARVEE Grant Anticipation Revenue Vehicle Bonds
GASB 34 Governmental Accounting Standards Board statement 34
GATS General Agreement on Trade in Services
GDP Gross Domestic Product
GE Gravel Equivalent
GEP Good Engineering Practice
GERT Graphical Evaluation and Review Technique
Gf Gravel Factor
GFE Good Faith Effort
GHSA Governors Highway Safety Association
GHSR Governor's Highway Safety Representative
GIS Geographic Information Systems
GNMA Government National Mortgage Association ("Ginnie Mae")
GOGO Government-Owned/Government-Operated
GPS Global Positioning System
GRAS Generally Recognized as Safe
GR Guard Rail
GRH Guaranteed Ride Home
GSA General Services Administration
GUI Graphical User Inerface
GVW Gross Vehicle Weight
GVWR Gross Vehicle Weight Rating


HA Health Advisory
H&T Hub and Tack
HABR Historic American Building Record
HABS Historic American Buildings Survey
HAER Historic American Engineering Record
HAP Hazardous Air Pollutant
HAPPS Hazardous Air Pollution Prioritization System
HAR Highway Advisory Radio
HASR Historic Architecture Survey Report
HAZMAT Hazardous Materials
HAZOPS Hazardous Operations
HB&M Humboldt Base and Meridian
HBO Health Benefits Office
HBRR Highway Bridge Rehabilitation and Replacement (Federal)
HCD California Housing and Community Development Department
HCM Highway Capacity Manual
HCP Habitat Conservation Plan
HCS Hazard Communication Standard
HDD Horizontal Directional Drilling
HDM Caltrans Highway Design Manual
HDPE High Density Polyethylene
HEDTL Harmer E Davis Transportation Library
HEEP Health and Environmental Effects Profile
HEPA Highly Efficient Particulate Air (Filter)
HERS-ST Highway Economic Requirements System-State Version Software
HES Hazard Elimination Safety Program (Federal)
HFC Hydrofluorocarbon
HHS US Department of Health and Human Services
HI Height of Instrument (surveying)
HIC Highway Interchange Center
HMA Hot Mix Asphalt
HMO Health Maintenance Organization
HMP Hydromodification Management Plan; or
Hazard Mitigation Plan
HMS Highway Maintenance System
HMTA Hazardous Materials Transportation Act
HMWM High Molecular Weight Methacrylate
HOV High Occupancy Vehicle
HP Horse Power
HPC High Performance Concrete (also Ultra High Performance Concrete)
HPMS Highway Performance Monitoring System
HP&R Highway Planning and research
HPS High Performance Steel
HPSR Historic Properties Survey Report
HR Human Resource
HRAC Hot Recycled AC
HRER Historic Resource Evaluation Report
HRI Highway Rail Intersection
HRNA Human Development Recovery Needs Assessments
HRIS Highway Research Information Service; or
Human Resources Information System
HSDB Hazardous Substance Data Base
HSIS Highway Safety Information System
HSNS Highway System of National Significance
HSP Highway Safety Plan
HSPF Heating Season Performance Factor
HSOPP Highway Systems Operations and Protection Plan
HSR High Speed Rail; or
Historic Survey Report
HSRI Highway Safety Research Institute
HTF Highway Trust Fund
HTIMS Highway Technology Information Management System
HTML Hypertext Markup Language
HTTP Hypertext Transport Protocol
HUD Housing and Urban Development; or
Head Up Display (Intelligent Transportation System)
HUTA Highway User Tax Account
HVAC Heating, Ventilation, and Air-Conditioning System
HWMP Hazardous Waste Management Plan


IAST Independent Assurance Sampling and Testing
IBRC Innovative Bridge Research and Construction Program (Federal Highway Administration - Transportation Enhancement Act 21)
IBTC International Border Trade Corridor
ICAS Internet Contract Administration System
ICES Intermodal Corridors of Economic Significance
I/D Incentive/Disincentive
IDL Interface Definition Language (Intelligent Transportation System)
IDP Individual Development Plan
IEEE The Institute of Electrical and Electronic Engineers
IEN Information Exchange Network (Intelligent Transportation System)
IFB Invitation for Bid
IGR Inter-Governmental Review
IHSDM Interactive Highway Safety Design Model
I/I Infiltration and Inflow
IIP Inter-Regional Improvement Program
ILD Inductive Loop Detector
IMMS Integrated Maintenance Management System
IMPC Integrated Plant Management and Control
IMPROVE Interagency Monitoring of Protected Environments
IMS Intermodal Facilities and Systems Management System
ILV/hr Intersecting Lane Vehicles per hour
IP Internet Protocol; or
Implementation Package
IPA Information Practices Act
IPG Interagency Planning Group
IRIS Integrated Risk Information System
IRP Interregional Partnership (Stanislaus Council of Governments)
IRR Intercity Rail; or
Indian Reservation Roads
IRRS Interregional Route System; or
Interregional Road System Plan
IRS Internal Revenue Service
IRVM Integrated Roadside Vegetation management
IRWA International Right of Way Association
IS Information Services; or
Initial Study
ISA Initial Site Assessment
ISC Indirect Source Control
ISEA International Safety Equipment Association
ISO International Standards Organization
ISP Information Service Provider
ISR Indirect Source Review
ISSC Information Systems Service Center
ISTEA Intermodal Surface Transportation Efficiency Act
IT Information Technology
ITA Intertribal Transportation Association
ITE Institute of Transportation Engineers
ITS Intelligent Transportation System
ITS America Intelligent Transportation Society of America
ITSP Interregional Transportation Strategic Plan
ITI Intelligent Transportation Infrastructure
ITII International Technical Information Institute
ITIP Interregional Transportation Improvement Program
ITMS Integrated Traffic Management System; or
Intermodal Transportation Management System
ITS Intelligent Transportation Systems; or
Institute of Transportation Studies
ITSP Interregional Transportation Strategic Plan
IUOE International Union of Operating Engineers
IVHS Intelligent Vehicle-Highway Systems (Now Intelligent Transportation System)
IVI Intelligent Vehicle Initiative
IVIS In Vehicle Information System (Intelligent Transportation System)


JB Junction Box
JCL Job Control Language
JCP Jointed Concrete Pavement
JP Joint Pole
JPA Joint Powers Agreement
JPCP Jointed Plain Concrete Pavement
JRCP Jointed Reinforced Concrete
JS Junction Structure
JUA Joint Use Agreement


KBES Knowledge Based Expert System
KSA Knowledge, Skills, and Abilities


LA Local Agency
LAAPS Local Agency Automated Pay System
LACMTA Los Angeles County Metropolitan Transportation Authority
LACTC Los Angeles County Transportation Commission
LAFCO Local Agency Formation Committee
LAMBRA Local Agency Military Base Recovery Area
LAN Local Area Network
LAP Local Assistance Program
LAPG Local Assistance Program Guidelines
LAPM Local Assistance Procedures Manual
LARTS Los Angeles Regional Transportation Study
LASC Landscape Architecture Standards Committee
LCA Least Cost Alternate
LCB Lean Concrete Base
LCC Local Coastal Commission; or
League of California Cities; or
Life Cycle Cost
LCCA Life Cycle Cost Analysis
LCD Liquid Crystal Display
LCFS Low Carbon Fuel Standard
LCO Labor Compliance Officer; or, Local Capital Outlay projects
LCP Local Coastal Plan
LCS Lane Control Sign
LCTOP Low Carbon Transit Operations Program
LDAP Lightweight Directory Access Protocol
LDPE Low Density Polyethylene
LDS Labor Distribution System
LEAD Local Equivalent Area Drainage Method
LED Light Emitting Diode
LEDPA Least Environmentally Damaging Practicable Alternative
LEL Lowest Explosive Level
LEM Location Efficient Mortgage (See Transit Oriented Development)
LEO Low-Earth Orbit Satellite System
LEP Limited English Proficiency
LESS Least Cost Estimating and Scheduling System
LF Late Finish; or, Linear Foot
LIBOR London InterBank Offered Rate
LIM Land Inventory and Monitoring System (Soil Conservation Service)
LIP Local Intersection Program
LJAC Local Jurisdiction Advisory Committee
LLP Limited Liability Partnership
LNG Liquefied Natural Gas
LOC Local
LOE Level of Effort
LOL Layout Line
LOP Letter of Permission
LOS Level of Service
LPA Local Programs Accounting
LPAMS Local Programs Accounting Management System
LPG Liquid Petroleum Gas
LPP Local Programs Procedures
LPP# Local Programs Procedure Number
LRDC Labor Relations Decision Council
LRFD Load and Resistant Factor Design
LRH Last Resort Housing
LRMS Location Reference Messaging Standard (Intelligent Transportation System)
LROP Long Range Operations Plan
LRT Light Rail Transit
LS Lump Sum; or
Late Start; or
Land Surveyor
LSSRP Local Seismic Safety Retrofit Program
LSTP Local Surface Transportation Plan
LSUM Linear Synchronous Unipolar Motor
LT Limited Term
L&T Lead and Tack (surveying)
LTA Local Transportation Authority
LTAP Local Technical Assistance Program
LTC Local Transportation Commission
LTEC Least Total Expected Cost to the public design
LTF Local Transportation Fund
LTMA Lightweight Truck Mounted Attenuator
LTPP Long-Term Pavement Performance
LTS Lime Treated Sub-base
LUICE Land Use Inventory Contingency and Edit
LUST Leaking Underground Storage Tank
LVDT Linear Variable Differential Transformers
LVR Low Volume Road


MA Master Agreement; or, Minimum Allocation funds; or, Minor Arterial
MACT Maximum Achievable Control Technology
MADT Monthly Average Daily Trips
MAGLEV Magnetic Levitation Transportation Technology Deployment Programs
MAIT Multidisciplinary Accident Investigation Team 
MAN Metropolitan Area Network (Intelligent Transportation System)
MAP-21 Moving Ahead for Progress in the 21st Century
MAP Million Annual Passengers; or
Multiple Alternative Planning
MAR Material Adjustment Report
MATES Materials and Technology Engineering and Science
MB Metal Beam; or, Megabytes
MBB Metal Beam Barrier
MBE Minority Business Enterprise
MBGR Median Barrier Guard Rail
MBO Management by Objectives
MC Medium Curing
MCAG Merced County Association of Governments
MCD Minor Civil Division
MCE Maximum Credible Earthquake
MCEDC Merced City Economic Development Corporation
MCFC Molten Carbonate Fuel Cell
MCL Maximum Contaminant Level
MCLG Maximum Contaminant Level Goal (water quality)
MCM Minimum Control Measures (water quality)
MCP Municipal Compliance Plan
MCSAP Motor Carrier Safety Assistance Program
MDB&M Mount Diablo Base and Meridian (surveying)
MDI Model Deployment Initiative (Intelligent Transportation System)
MEA Master Environmental Assessment
MEP Minority Engineering Programs; or
Maximum Extent Practicable (water quality)
MERS Maintenance Employees' Reporting System
MESO Maintenance Employee Safety Orientation
META Maintenance Equipment Training Academy
METS Materials Engineering and Testing Services
MG Minimum Guarantee funds
MID Modesto Irrigation District
MIME Multipurpose Internet Mail Extension
MIS Management Information Systems; or
Major Investment Study
MITMT Major Incident Traffic Management Team
MJC Major Collector (rural); or
Modesto Junior College
MLRA Major Land Resources Area
MMANC Municipal Management Association of Northern California
MMI Man-Machine Interface (Intelligent Transportation System)
MMSI Maintenance Management System Improvement
MNC Minor Collector (rural)
MOA Memorandum of Agreement
MODEM Modulator/Demodulator (conversion of binary to analog signal for phones)
MOE Measure of Effectiveness
MOS Metal-Oxide Semiconductor; or
Margin of Safety
MOST Methodology for Optimizing Signal Timing
MOU Memorandum of Understanding
MPGR Metal Plate Guard Railing
MPO Metropolitan Planning Organization
MPU Micro Processing Unit
MSA Maintenance Superintendents Association; or
Merit Salary Adjustment; or, Metropolitan Statistical Area; or
Management System Activities
MSAHP Medical Savings Account Health Plan
MS-DOS MicroSoft-Disk Operating System
MSDS Manufacturers Safety Data Sheet
MSE Mechanically Stabilized Earth Retaining
MS4 Municipal Separate Storm Sewer System
MSL Maintenance Service Level; or
Mean Sea Level
MSW Municipal Solid Waste
MT Mass Transit
MTA Mass Transit Account
MTC Metropolitan Transportation Commission (Bay Area)
MTD Memo To Designers
MTDB Metropolitan Transit Development Board (San Diego)
MTMC Military Traffic Management Command
MTP Mass Transportation System; or
Metropolitan Transportation Plan
MUTCD Manual of Uniform Traffic Control Devices
MVMA Motor Vehicle Manufacturers Association
MWBE Minority Women-Owned Business Enterprise


NA National Architecture (Intelligent Transportation System)
NAA Non-Attainment Area
NAAQS National Ambient Air Quality Standards
NACE National Association of Corrosion Engineers; or
National Association of County Engineers
NACG National Association of County Governments
NAC National Association of Counties
NACTO The National Association of City Transportation Officials
NAD North American Datum (surveying)
NAE No Adverse Effect; or
National Academy of Engineering
NAER National Architectural and Engineering Record
NAFTA North American Free Trade Agreement
NAGPRA 1990, Native American Graves Protection and Repatriation Act
NAHC Native American Heritage Commission
NAHSC National Automated Highway System Consortium
NAICS North American Industrial Classification System
NALEO National Association of Latino Elected and Appointed Officials
NAMS National Air Monitoring Stations
NAP Non-attainment Area Plan
NAPA National Academy for Public Assistance; or
National Asphalt Paving Association; or
National Automobile Parts Association
NAR National Architecture Review (Intelligent Transportation System)
NARC National Association of Regional Councils
NARD Numerical Analysis of Roadside Design
NARSTO North American Research Strategy for Tropospheric Ozone
NAS National Academy of Sciences
NASA National Aeronautics and Space Administration
NASR Negative Archeological Survey Report
NASS National Accident Sampling System
NATTC National Association of Transportation Technology Transfer Centers
NAV Navigation
NAWCA North American Wetlands Conservation Act
NB Northbound
NBI National Bridge Inventory
NBIS National Bridge Inspection Standards
NBS National Bureau of Standards
NBSSR Noise Barrier Scope Study/Summary Report (sound wall projects)
NCAC National Crash Analysis Center
NCAPA Northern California Asphalt Producers Association
NCAT Northern California Asphalt Producers Association
NCCER National Council for Civil Engineering Research
NCEER National Center for Earthquake Engineering Research
NCHRP National Cooperative Highway Research Program
NCPP National Center for Pavement Preservation
NCSL National Conference of State Legislatures
ND Negative Declaration; or
None Detected (water quality)
NDAA Natural Disaster Assistance Act
NDI Non-Industrial Disability Insurance
NDSP National Dam Safety Program
NDT Non-Destructive Testing
NE No Effect
NEAR National Emergency Aid Radio
NEDS National Emissions Data System
NEEP National Experimental and Evaluation Program
NEHRP National Earthquake Hazards Reduction Program
NEIS National Environmental Information Service
NEMA National Electrical Manufacturers Association
NEPA 1969, National Environmental Policy Act
NES/BA Natural Environmental Survey/Biological Assessment
NESHAP National Emission Standards for Hazardous Air Pollutants
NET National Emissions Trends Inventory
NFIP National Flood Insurance Program
NFPA National Fire Prevention Association
NGS National Geodetic Survey
NGVD National Geodetic Vertical Datum
NHI National Highway Institute
NHPA 1966, National Historic Preservation Act 
NHPN National Highway Planning Network
NHS National Highway System
NHSB National Highway Safety Bureau
NHTSA National Highway Traffic Safety Administration 
NIA National ITS (Intelligent Transportation System) Architecture
NICET National Institute for Certification in Engineering Technologies
NIH National Institutes of Health
NII National Information Infrastructure (Intelligent Transportation System)
NNIOSH National Institute for Occupational Safety and Health
NIPC National Infrastructure Protection Center (Federal Bureau of Investigation)
NIST National Institute of Standards and Technology
NLAA Not Likely to Adversely Effect
NLT COB No Later Than Close of Business
NMCSP National Motor Carrier Safety Program
NMFS National Marine Fisheries Service
NMSL National maximum Speed Limit
NO Nitrous Oxide
NOA Naturally Occurring Asbestos; or
Notice of Arrival; or
Notice of Availability
NOAA National Oceanic and Atmospheric Administration
NOAEL No Observed Adverse Effect Level
NOEL No Observable Effect Level
NOC Notice of Construction
NOCC Notice of Construction Completion
NOD Notice of Determination (California Environmental Quality Act project approval)
NOI Notice of Intent
NOL Naval Ordinance Laboratory
NOP Notice of Preparation
NOPR Notice of Proposed Rulemaking
NOS National Oceanic Survey; or
Not Otherwise Specified
NOT Notice of Termination
N2O Nitrous Oxide
NOx Nitrogen Oxides
NORM Naturally Occurring Radioactive Material
NPDES National Pollutant Discharge Elimination System
NPHQ National Partnership for Highway Quality
NPRM Notice of Proposed Rule Making
NPS National Park Service; or
Non-Point Source
NRC National Research Council

Natural Resources Conservation Service (Formerly Soil Conservation Services)

NRCP Non Reinforced Concrete Pip
NRDC National Resources Defense Council
NRHP National Register of Historic Places
NRI National Resources Inventory
NRVMA National Roadside vegetative Management Association
NS Non-Regulatory Supplement
NSF National Science Foundation
NSIS National Safety Information Systems
NSPE National Society of Professional Engineers
NTCIP National Transportation Communications for ITS (Intelligent Transportation System) Protocol
NTI National Transit Institute; or
National Toxics Inventory
NTIS National Technical Information Service
NTN National Truck Network
NTP Notice to Proceed; or
National Transportation Policy; or
National Toxicology Program
NTPAW National Transportation Public Affairs Workshop
NTR New Technology and Research
NTSB National Transportation Safety Board
NTU Nephelometric Turbidity Units
NURP Nationwide Urban Runoff Program
NWI National Wetland Inventory
NWP Nation Wide Permit


OA Obligation Authority (Federal)
OAQPS Office of Air Quality Planning and Standards (Federal)
OBM Office of Business Management
OBS Organization Breakdown Structure
OBRA90 Omnibus Budget Reconciliation Act of 1990
OC Over-Crossing
OCP Office of Community Planning
OCTA Orange County Transportation Authority
O&D Survey Origin and Destination
O&M Operation and Maintenance
OE Office Engineer; or
Operating Expense
OEA Office of External Audits; or
Office of Energy Assessments; or
Office of Environmental Analysis
OECA Office of Enforcement and Compliance Assurance (Federal)
OEM Original Equipment Manufacturer
OES Office of Emergency Services
OFCCP Office of Federal Contract Compliance Programs
OGAC Open Graded Asphalt Concrete
OGAC(R) Open Graded Asphalt Concrete (Rubberized)
OH Overhead
OHP Office of Historic Preservation (California)
OHWM Ordinary High Water Mark
OIG Office of the Inspector General
OIP Order of Immediate Possession
OJT/SS On The Job Training/Supportive Services
OLP Office of Local Programs
OJT On The Job Training
OMB Office of Management and Budget
OPA Other Principal Arterial
OPEC Organization of Petroleum Exporting Countries
OPO Office of Personnel Operations
OPPD Office Project Planning and Design
OPPTS Office of Prevention, Pesticides, and Toxic Substances (Federal)
OPR Office of Planning and Research (State)
ORC Organizational Review Committee
ORCP Oval Reinforced Concrete Pipe
OREA Office of Real Estate Appraisers
OSC Office of Structure Construction
OSHA Occupational Safety and Health Administration (Federal)
OSI Open Systems Interconnection (Intelligent Transportation System)
OSM&I Office of Structures and Maintenance Inspection
O3 Ozone
OST Office of the Secretary of Transportation; or
Out of State Travel
OT Overtime
OTI Office of Traffic Improvement
OTP Operational Test Plan (Intelligent Transportation System)
OTS Office of Traffic Safety
OWM Office of Wastewater Management (Federal)
OWP Overall Work Plan/Program


P2 Pollution Prevention
P3 Primavera Project Planner
P4 Pollution Prevention Permitting Project
P&P Park-And-Ride
PABS Programming and Budgeting System
PAC Policy Advisory Committee
PACT Program Accountability in Caltrans
PADP Ports Access Demonstration Project
PA&ED Project Approval & Environmental Document
PAI Principal Arterial Interstate
PAMS Photochemical Assessment Monitoring Stations
PA/SI Preliminary Assessment/Site Investigation
PAP Perforated Aluminum Pipe
PAQSD Primary Air Quality Standards

Personnel Action Request; or
Project Authorization Request; or
Project Approval Report

PARF Position Action Request Form
PASSER II Progression Analysis and Signal System Evaluation Routine
PATH Partners for Advanced Transportation and Highways
PAYT Pay As You Throw
PB Paint Binder; or
Pull Box
Pb Lead
PBA Performance Based Asphalt
PBDEs Polybrominated Diphenyl Ethers (See Brominated Flame Retardants)
PBMS Performance Based Measurements Systems
PBO Programmatic Biological Opinion
PBX Private Branch Exchange
PC Program Coordinator; or
Prime Coat; or
Party Chief; or
Personal Computer
PCA Portland Cement Association
PCBs Polychlorinated Biphenyls
PCC Point of Compound Curvature; or
Portland Cement Concrete
PCCP Portland Cement Concrete Pavement; or
Pre-stressed Concrete Cylinder Pipe
PCE Programmatic Categorical Exclusion (National Environmental Policy Act); or
PCEPH Passenger Car Equivalents Per Hour
PCI Paint Condition Index; or
Precast/Prestressed Concrete Institute
PCi/L Pico Curies per Liter (water quality, radioactivity)
PCP Primary Care Physician 
PCS Personal Communications System
PCSD President's Council on Sustainable Development
PCR Project Change Request
PCS Project Control Survey; or
Permit Compliance System
PCVC Point of Compound Vertical Curve
PD Project Development
PDA Personal Digital Assistant
PDF Portable Document Format
PDH Professional Development Hour
PDM Probabilistic Dilution Model; or
Precedence Diagramming Method
PDO Property Damage Only
PDPM Project Development Procedures Manual
PDRC Pavement Design and Rehabilitation Committee
PDS Project Development Support
PDT Project Development Team
PE Preliminary Engineering; or
Polyethylene; or
Professional Engineer; or
Project Engineer
PEAR Preliminary Environmental Assessment Report
PECG Professional Engineers in California Government
PEDP Professional Engineer Development Program
PEER Permit Engineering Evaluation Report
PeMS Performance Measurement System
PERMIS Personnel Employee Records for the Management Information System
Permit 106 Review Process for the National Historic Preservation Act
Permit 1601 A streambed alteration agreement for US Department of Fish and Game
Permit 4(f) Use of parkland permit
404 Permit Issued by US Army Corps of Engineers
Permit 7 Re: Endangered Species Act
PERS Public Employee Retirement System
PERT Project Evaluation and Review Technique
PES Preliminary Environmental Study
PET Project Estimating Tool
PF Planned Finish date; or
Pay Factor
PFCs Perfluorinated Carbons
PFT Permanent Full Time
PG&E Pacific Gas and Electric
PHG Public Health Goal (water quality, California Environmental Policy Act)
PHS US Public Health Service
PI Permanent Intermittent
PIA Project ITS (Intelligent Transportation System) Architecture
PIAS Personal Information Access Subsystems (Intelligent Transportation System)
PKm Post Kilometer
PLH Public Land Highway (Federal)
PI Permanent Intermittent (Civil Service Appointment); or
Preliminary Investigation; or, Point of Intersection
PIB Personnel Information Bulletin
PIC Private Industry Council
PID Project Initiation Document
PIER Post-Implementation Evaluation Report
PIMS Personnel Information Management System
PIN Personal Identification Number; or
Priority Index Number
PIO Public Information Officer
PIP Payroll Input Process; or
Project Initiation Proposal
PISA Project Information System and Analysis/Administration
PK Parker-Kalan Nail
P/L Property Line
PL Project Level Assessment
PLA Project Labor Agreement
PLP Personal Leave Program
PLUM Projected Land Use Model
PM2.5 Particulate Matter <2.5 microns in size
PM10 Particulate Matter <10 microns in size
PM Project Manager; or
Post Mile; or
Preventative Maintenance; or
Particulate Matter
PMBOK Project Management Body of Knowledge
PMCS Project Management Control System
PMDW Project Management Data Warehouse
PMI Project Management Institute
PMP Perforated Metal Pipe; or
Project Management Professional
PMPM Project management Procedures manual
PMR Position Management Report
PMS Pavement Management System; or
Parking Management System (Intelligent Transportation System)
PMSU Project Management Support Unit
PM-10 Particulate Matter 10 microns or smaller
PN Paving Notch
PO Purchase Order
POC Pedestrian Over-Crossing; or
Point on (horizontal) Curve
POE Port of Entry
POGO Privately-Owned/Government-Operated
POM Particulate Organic Matter; or
Polycyclic Organic Matter
POP Post Office Protocol; or
Purpose of Project
POS Point of Service health plan
POT Point on Tangent
POVC Point on Vertical Curve
P&P Policy and Procedure
PPB Parts Per Billion
PPC Plastic Pipe Culvert
PPDG Project Planning and Design Guide
PPE Personal Protective Equipment
PPIC Public Policy Institute of California
PPM Planning, Programming, and Monitoring; or
Policies and Procedures Memorandum; or
Parts Per Million
PPNO Planning and Programming Number
PPO Preferred Provider Organization
PPT Permanent Part-Time; or
Parts Per Trillion
PQS Professionally Qualified Staff
PR Project Report
P&R Park and Ride
PRC Point of Reversing Curve
Prop 116 State bicycle program
PRF Pavement Reinforcing Fabric
PRISM Performance and Registration Information System Management
PRS Performance Related Specifications
PRSM Project Resources and Schedule Management
PRVC Point of Reverse Vertical Curve
PS Planned Start Date
PSA Program Supplemental Agreement; or
Precursor System Architecture (Intelligent Transportation System)
PSCS Project Schedule and Control System
PSDP Planning Staff Development Program
PSI Preliminary Site Investigation; or
Pounds Per Square Inch; or
Pollutant Standards Index
PSIG Pressure Per Square Inch Gauge
PSM Point Source Monitoring
PSP Pedestrian Safety Program; or
Perforated Steel Pipe
PSR Project Study Report for State Transportation Improvement Projects (STIP)
PSS Personnel Services Specialist

Project Scoping Summary Report for State Highway Operations and Protections Program (SHOPP) projects

PSTIP Proposed State Transportation Improvement Program
PSTN Public Switched Telephone Network
PTA Public Transportation Account
PTMS Public Transportation Management System
PTMISEA Public Transportation Modernization, Improvement, and Service Enhancement Account
P2P TCD Peer-To-Peer program on Traffic Control Devices (Federal Highway Administration)
PTS Positive Train Separation (Intelligent Transportation System)
PUC Public Utilities Commission
PVC Polyvinyl Chloride
PVEA Petroleum Violation Escrow Account
PY Person-Year (1758-1800 hours)
PYE Person Year Equivalent 
PYPSCAN Person Year Project Scheduling and Cost Analysis


QAP Quality Assurance Program; or
Qualification Appraisal Panel
QA/QC Quality Assurance/Quality Control
QBS Qualification Based Selection
QCIP Quality and Continuous Improvement Program
QCRP Quality Control Review Process
QIP Quality Improvement Plan
QoS Quality of Service


RA Reasonable Alternative; or
Regulatory Alternatives; or
Regulatory Analysis; or
Remedial Action; or
Resource Allocation; or
Risk Analysis; or
Risk Assessment
RABA Revenue Aligned Budget Authority
RAC Rubberized Asphalt Concrete; or
Research Advisory Committee
RACM Reasonable Available Control Measures (air quality)
RAD Rapid Application Development; or
Radiation Adsorbed Dose
RAM Responsibility Assignment Matrix
RAN Revenue Anticipation Note
RAO Regional Administrative Officer
RAP Relocation Assistance Program/Payments; or
Reclaimed Asphalt Pavement
RAPID Rural Agency Project Implementation District
RATP Regional Active Transportation Plan
RAQS Regional Air Quality Strategy
RAS Regional Arterial System
RAW Revenue Anticipation Warrant
RBS Resource Breakdown Structure
RCA Recycled Concrete Aggregate
RCM Reliability Centered Maintenance 
RCP Reinforced Concrete Pipe
RCR Route Concept Report
RCRA Resource Conservation and Recovery Act
R&D Remove and Dispose
RDO Regular Day Off
RDP Route Development Plan
RDNA Recombinant DNA
RDS Radio Data Systems (Intelligent Transportation System)
R&S Remove and Salvage
RE Resident Engineer
REMOVE Reduced Motor Vehicle Emissions Program
REVISIT RBS (Resource Breakdown Structure) Evaluation, Verification, Integration, and Support Improvement Team
RFA Request For Authorization
RFB Request For Bid
RFG Reformulated Gasoline
RFP Request for Proposal
RFQ Request for Qualifications; or
Request for Quotation
RFS Richmond Field Station (UCB)
RHNA Regional Housing Needs Assessment
RIA Regulatory Impact Analysis; or
Regional ITS (Intelligent Transportation System) Architecture
RICO Racketeer Influenced and Corrupt Organizations Act
RIFA Red Imported Fire Ant
RIP Regional Improvement Plan
RLF Red Legged Frog
RM Risk Management
RMP Regional Mobility Plan
ROD Record of Decision
ROE Report of Expenditures
ROG Reactive Organic Gases
ROW Right Of Way
RRC Rural Residential Center
RRR Resurfacing (overlay), Restoration (to original condition), Rehabilitation (upper guardrail, widen shoulders)
R/S Resource/Schedule
RSP Roadway Safety Program (American Traffic Safety Services Association)
RSPA Research and Special Programs Administration
RSTP Regional Surface Transportation Program
RTIF Regional Transportation Impact Fee
RTIP Regional Transportation Improvement Program
RTL Ready To List
RTP Regional Transportation Plan
RTPA Regional Transportation Planning Agency
RTS Remote Traveler Support Subsystem (Intelligent Transportation System)
RSTP Regional Surface Transportation Program
RWQCB Regional Water Quality Control Board


SAAMP Special Area Aquatic Management Plan
SAB Seismic Advisory Board
SACOG Sacramento Area Council of Governments
SADBU Small and Disadvantaged Business utilization
SAE Society of Automotive Engineers
SAFEs Service Authorities for Freeway Emergencies
SAFETEA 2003, Safe, Accountable, Flexible, and Efficient Transportation Equity Act
SAIN Substance Abuse Information Network
SAM State Administrative Manual
SAME Society of American Military Engineers
SAMI Stress-Absorbing Membrane Interlayer
SANBAG San Bernardino Associated Governments
SANDAG San Diego Association of Governments
SAP Sampling and Analysis Plan
SAPA State Asphalt Paving Associations
SAVE Society of American Value Engineers
SB Senate Bill
SBB&M San Bernardino Base and Meridian (surveying)
SB45 1997, state increase of authority of Regional Transportation Planning Agencies
SBS Sick Building Syndrome
SC Slow Curing; or, Start Construction
SCADA Supervisory Control and Data Acquisitions
SCAG Southern California Association of Governments
SCANDI Surveillance Control and Driver Information System
SCBT Segmental Concrete Bridge Technology
SCC Self-Consolidating Concrete 
SCE Southern California Edison
SCEDCO Stanislaus County Economic Development Corporation
SCFM Standard Cubic Feet Per Minute
SCH State Clearing House
SCO State Controllers Office
SCOH Standing Committee on Highways
SCR State Controllers Report
SCS Soil Conservation Service (Now Natural Resources Conservation Service)
SCSP Storm and Combined Sewer Program
SD Structurally Deficient (bridge); or
Standard Deviation
SDC Seismic Design Criteria
SDO Standards Development Organization
SDP Strategic Deployment Plan
SDWA Safe Drinking Water Act
SEA Systems Engineering Analysis
SEAC Sulfur Extended Asphalt Concrete 
SEC US Securities and Exchange Commission
SEP Special Emphasis Program; or
Special Experimental Project
SER Standard Environmental Reference
SF Scheduled Finish Date; or
Start-To-Finish; or
Standard Form; or

San Francisco-Oakland Bay Bridge

SFP Single Focal Point
S&H Streets and Highways Code
SHA State Highway Account; or
State Highway Agency
SHBSB State Historic Building Safety Board
SHELL Subsystem of Highways for the Movement of Extralegal Permit Loads
SHOPP State Highway Operation and Protection Program
SHRP State Highway Research Program
SHS State Highway System
SHPO State Historic Preservation Officer
SHRC State Historical Resources Commission
SHWL Seasonal High Water Level
SI International System of Units
SI&A Structure Inventory and Appraisal
SIB State Infrastructure Bank
SIC Standard Industrial Classification; or
Standard Industry Code
SIG Special Interest Group
SIGOP Signal Optimization
SIMS Sign Inventory management System
SIP State Implementation Plan (air quality)
SISA Special In-Grade Salary Adjustment
SJCOG San Joaquin Council of Governments
SJHTC San Joaquin Hills Transportation Corridor
SJVAPCD San Joaquin Valley Air Pollution Control District
SLA Structures Local Assistance
SLAE Structure Local Assistance Engineer
SLAMS State and Local Air Monitoring Stations
SLC State Land Commission
SLD Sea Level Datum
SLIP Serial Line Internet Protocol
SLPDP State and Local Project Development Program
SLTC Soluble Threshold Limit Concentration (State)
SMARA Surface Mining and Reclamation Act (State)
SMART Structure Maintenance Automatic Report Transmittal System
SMBB Single Metal Beam Barrier
SMR Specialized Mobile Radio
SMS Highway Safety Management System
SMSA Standard Metropolitan Statistical Area
SMTP Simple Mail Transfer Protocol
SNAP Sonic Nap Alert Pattern (rumble strip)
SNC Significant Noncompliance
SNMP Simple Network Management Protocol (Intelligent Transportation System)
SO Sulfur Dioxide
SOAP Signal Operations Analysis Package
SOC Synthetic Organic Chemicals
SOF State Only Funding
SOFC Solid Oxide Fuel Cell (See Auxiliary Power Units)
SONET Synchronous Optical Network (Intelligent Transportation System)
SOQ Statement of Qualifications
SOV Single Occupancy Vehicle
SOW  Statement of Work
SO2 Sulfur Dioxide
SOx Sulfur Oxides
SPB State Personnel Board
SPE Start Preliminary Engineering
SPI Schedule Performance Index

State Planning and Research

SR2S Safe Routes To Schools program
SPMIT Statewide Project Management Improvement Team
SPRR Southern Pacific Railroad
SQL Standard Query Language
SR Sufficiency Rating (bridge); or
State Route
SRF State Revolving Fund (Clean Water Act)
SROA State Restriction of Appointments
SRP Secondary Road Plans
SRT Slotted Rail Terminal
SRTP Short Range Transit Plans
SS Scheduled Start Date; or
Start to Start
SSE Separate State Estimate
SSA Sole Source Aquifer
SSB Scope, Schedule, and Budget
SSAMBN Such Sums As May Be Necessary
SSES Sewer System Evaluation Survey
SSO Sanitary Sewer Overflow
SSPP Structural Steel Plate Pipe
SSPs Standard Special Provisions
SSR Standard Speed Rail
SSTAC Social Service Transportation Advisory Council
STA State Transit Assistance; or, State Transportation Agency
STAA 1982, Surface Transportation Assistance Act
STANCOG Stanislaus Council of Governments
STAPPA State And Territorial Air Pollution Program Administrators
STBB Single Thrie Beam Barrier
STC State Training Center
STD State Transportation Department
STE State Transportation Enhancement
STEL Short-Term Exposure Limit
STIP State Transportation Improvement Program
STA State Transit Assistance
STC State Training Center
STMF Simple Transportation Management Framework (Intelligent Transportation System)
STMP Simple Transportation Management Protocol (Intelligent Transportation System)
STO Smart Testing Operations
STP Surface Transportation Program (Federal)
STPP Surface Transportation Policy Project
STPL Surface Transportation Program (Local)
STRAHNET Strategic Highways Network
STRUDL Structural Design Language
STURAA 1987, Surface Transportation and Uniform Relocation Assistance Act
SU Source Unit
SUDP Specific Urban Development Plan
SULEV Super Ultra Low Emission Vehicles
SUSMP Standard Urban Storm water Mitigation Plan
SV Schedule Variance
SW Side Walk; or, Storm Water
SWDR Storm Water Data Report
SWITRS Statewide Integrated Traffic Records System
SWLF Solid Waste Landfill
SWMP Storm Water Management Plan
SWMU Solid Waste Management Unit
SWPPP Storm Water Pollution Prevention Plan
SWQAG Storm Water Quality Assessment Guide
SWRCB State Water Resources Control Board
SWTF Storm Water Task Force
SYSOP Systems Operator


T2 Technology Transfer
TA Technical Advisory
TAC Technical Advisory Committee
TAC/ALC Technical Advisory Committee for Agricultural Land Conservation
TAG Technical Advisory Group
TAM Transportation Asset Management (Federal Highway Administration)
TAS Toll Administration Subsystem
TAR Tribal Authority Rule
TASAS Traffic Accident Surveillance and Analysis System
TAT Tire Anchor Timber Wall
TAU Temporary Authorization Appointment
TAZ Transportation Analysis Zone
TB Top of Bank
TBB Thrie Beam Barrier
TBC Top Back of Curb
TC Top of Curb
TCA Transportation Corridor Agency
TCAG Tulare County Association of Governments
TCAT Tulare County Area Transit
TCB Traffic Control Box
TCCC Transportation Curriculum Coordination Council (Federal Highway Administration)
TCDD Dioxin (Tetrachlorodibenzo-p-dioxin)
TCDH Traffic Control Devices Handbook
TCE Trichloroethylene
TCI Transit Capital Improvement program
TCIP Transit Communications Interface Profiles (Intelligent Transportation System)
TCLP Toxicity Characteristic Leaching Procedure (Federal)
TCM Transportation Control Measure
TCP Traffic Control Plan
TCP/IP Transmission Control Protocol/Internet Protocol
TCR Transportation Concept Report; or
Transportation Corridor Report
TCRA Traffic Congestion Relief Act
TCRF Traffic Congestion Relief Fund
TCRP Transportation Congestion Relief Program; or
Transit Cooperative Research Program
TCS Transportation Control Strategy; or
Traffic Controller Synchronizer; or
Traffic Control Systems; or
Transportation Corridor Study; or
Toll Collection Subsystem
T&D Training and Development
TDA 1971, Transportation Development Act
TDD Telecommunications Device for the Deaf
TDIP Technology Deployment Initiatives and Partnerships
TDM Transportation Demand Management; or
Travel Demand Management
TDMA Time Division Multiple Access (Intelligent Transportation System)
TDP Transportation Development Plan; or
Tons Per Day (air quality)
TDT Transportation Data Template
TDS Total Dissolved Solids
TE Transportation Engineer
T&E Threatened and Endangered (species)
TEA Transportation Enhancement Act/Activities program (Federal)
TEC Travel Expense Claim; or
Total Escalated Cost
TEA-21 Transportation Equity Act for the 21st Century (Federal)
TeNS Technical Noise Supplement
TERO Tribal Employment Rights Office or Ordinances
TF Total Float; or
Target Finish date
TFHRC Turner-Fairbank Highway Research Center
TFMTAC Transportation Forecasting Model Technical Advisory Committee
THC Total Hydrocarbons
THM Trihalomethanes
TI Traffic Index; or
Temporary Intermittent 
TIC Technical Information Center
TID Turlock Irrigation District
TIE Toxicity Identification Evaluation
TIES Total Integrated Engineering System
TIF Transportation Investment Fund; or
Truck Inspection Facility
TIFIA Transportation Infrastructure Finance and Innovation Act
TIGER Topologically Integrated Geographic Encoding Referencing System
TIP Transportation Improvement Program
TIS Travelers Information System
TIME Tulare Intermodal Express (Tulare Transit)
TISP The Infrastructure Security Partnership
T&L Time and Labor
TL Transportation Laboratory
TLI Terrain Line Interpolation
TLV Threshold Limit Value
TMA Transportation Management Association/Area
TMC Transportation management Center; or
Traffic Management Center
TMCC Truck-Mounted Crash Cushion
TMDD Traffic Management Data Dictionary (Intelligent Transportation System)
TMDL Total Maximum Daily Load/Limit
TMIP Travel Model Improvement Program
TMP Transportation management Plan
TMS Traffic Management/Monitoring/Maintenance System/Subsystem
TNT Trinitrotoluene
TOC Traffic Operations Center; or
Total Organic Carbon
TOD Transit Oriented Development
TOMIS Traffic Operations Management Information Service
TON Threshold of Odor Number (water quality)
TOPICS Traffic Operations Program to Improve Capacity and Safety
TOPSS Transportation Operations and Project Support System 
TOS Traffic Operations System
TOT/MVM Total Accidents per Million Vehicle Miles
TP Turning Point (surveying)
TPB Treated Permeable Base
TPC Technical Planning Committee
TP&D Transportation Planning and Development account

Truck Passing Lane

TPM Transportation Planning Manual
TQM Total Quality Management
TRAMS Transportation Accounting and Management System
TRAQ Transportation Air Quality Center
TRARR Traffic on Rural Roads
TRB Transportation Research Board (formerly Highway Research Board)
TRIP The Road Information Program
TRIS Transportation Research Information System; or
Toxic Release Inventory System
TRMC Transit Management Center
TRMS Transit Management Subsystem
TRRL Transportation Road Research Laboratory
TRS Time Reporting System
TRSP Traffic-Responsive Plan 
TRT Technical Review Team; or
Transportation Research Thesaurus
TRVS Transit Vehicle Subsystem (Intelligent Transportation System)
TSC Transportation Systems Center
TSCA Toxic Substances Control Act
TSDP Transportation System Development Plan
TSDF Treatment, Storage, and Disposal Facilities
TSIP Transportation Systems Information Program
TSM Transportation System Management program (state)
TSN Transportation System Network
TSO Time-Share Operation
TSPP Total Suspended Particulates; or
Traffic Synchronization Projects
TSS Total Suspended Solids
TSSDRA Transit System Safety, Security, and Disaster Response Account
TSSS Total Station Survey System
TTHM Total Trihalomethane
TTLC Total Threshold Limit Concentration
TTIA 1995, Technology Transfer Improvements Act
TTN Technology Transfer Network
TTP Technology Transfer Program
TTY Teletype
TVOC Total Volatile Organic Compounds
TVOC Total Volatile Organic Compounds
TWLTL Two Way Left Turn Lane


UA Urbanized Area
UAA Use Attainability Analysis (water quality)
UAM Urban Air-shed Model
UAQI Uniform Air Quality Index
UART Universal Asynchronous Transmitter Receivers
UC Under-Crossing
UCITS University of California Institute of Transportation Studies
UCP Unified Certification Program (Disadvantaged Business Enterprise)
UCS Unconfined Compressive Strength
UFAS Uniform Federal Accessibility Standards
UG Underground
UGB Urban Growth Boundaries
UHPC Ultra High Performance Concrete
UIT Ultrasonic Impact Treatment
UITP International Union of Public Transport
ULEV Ultra Low Emission Vehicles
UMRA Unfunded Mandates Reform Act
UMTA Urban Mass Transit Agency/Administration
UNESCO United Nations Educational, Scientific, and Cultural Organization
UNPARs Unprogram Project Approval Requests
UP Underpass
URISA Urban and Regional Information Systems Association
URL Universal Resource Locator; or
Universal Reader Language
UROAD Urban Mass Transportation Agency
USA Underground Service Alert
USC United States Code; or
Unified Soil Classification
USC&GS United States Coast and Geodetic Survey
USCE United States Corps of Engineers (Army)
USCG United States Coast Guard
USDA US Department of Agriculture
USFS US Forest Service
USFWS United States Fish and Wildlife Service
USGS United States Geological Survey
USM Urban Simulation Model
USPLS United States Public Land Surveys
USR User Service Requirement
UST Underground Storage Tank
USTIP Updated State Transportation Improvement Program
USTR United States Trade Representative
UTC Ultimate Transportation Corridor
UTCS Urban Traffic Control System
UTPS Urban Transportation Planning System
UUA Use Attainability Analysis
UV Ultraviolet
UZA Urbanized Area


VA Value Analysis
VC Vertical Curve
V/C Volume/Capacity ratio
VCM Vertical Control Monumentation
VDT Video Display Terminal
VE Value Engineering
VECP Value Engineering Change Proposal
VELB Valley Elderberry Longhorn Beetle
VEP Value Engineering Proposal
VFC Vehicle Fuel Consumption
VGA Virtual Graphics Array
VHT Vehicle-Hours of Travel
VISTA Video Information System Training Association, Inc.
VKT Vehicle Kilometers Traveled
VMS Variable Message Sign
VMT Vehicle Miles Traveled
VOC Volatile Organic Compounds; or
Volume and Occupancy Control/Constant
VOS Vehicle Operating Survey
VRC Vehicle/Roadside Communications (Intelligent Transportation System)


WADS Wide Area Detection Systems
WAN Wide Area Network
WASHTO Western Association of State Highway and Transportation Officials
WBE Woman-owned Business Enterprise
WBS Work Breakdown Structure
WC Worker's Compensation
WCC Work Category Code
WCT Woodlake City Transit
WDT Weight-Distance Tax
WEN Workload Estimating Norm
WES Waterways Experiment Station
WET Wetland Evaluation Technique
WGRA Western Governmental Research Association
WIB Workforce Investment Board
WPA Watershed Protection Approach
WPCM Water Pollution Control Manager
WPCP Water Pollution Control Program
WQBEL Water Quality -Based Effluent Limit
WQC Water Quality Criteria
WQI Watershed Quality Index
WQS Water Quality Standard
WS White Stripe
WSP Welded Steel Pipe
WSRA Wild and Scenic Rivers Act
WSPRO Water Surface Profile
WSTP Wastewater Sewage Treatment Plant
WWTP Wastewater Treatment Plant
WZS Work Zone Safety
WZTC Work Zone Traffic Control


XPM Expert Project Management


YARTS Yosemite Area Regional Transportation System
YATI Yosemite Area Traveler Information
YS Yellow Stripe


ZBB Zero Based Budgeting
ZEV Zero Emissions Vehicle
ZRL Zero Risk Level