The Regional Transportation Plan (RTP) is a long-range planning document that defines how the region plans to invest in the transportation system over 20+ years based on regional goals, multi-modal transportation needs for people and goods, and estimates of available funding.  

The Sustainable Communities Strategy (SCS) is a component of the RTP, required by SB 375, that sets forth a forecasted development pattern for the region, which, when integrated with the transportation network and other transportation measures and policies, will reduce greenhouse gas (GHG) emissions from passenger vehicles and light trucks to achieve the GHG reduction targets set by the California Air Resources Board.  The future land use and transportation scenario presented in the SCS must accommodate forecast population, employment, and housing sufficient to meet the needs of all economic segment of population, including the State-mandated Regional Housing Needs Assessment (RHNA), while considering State housing goals.