The SEIR for the 2022 RTP/SCS will be a supplement to the 2015 RTP Program EIR and 2018 RTP/SCS SEIR (State Clearinghouse # 2014022018). This is the appropriate level of environmental documentation for the 2022 RTP/SCS because changes to existing conditions (including regulatory updates), the transportation project list, and land use scenario evaluated in the 2022 RTP/SCS are expected to be minor relative to the 2015 RTP and 2018 RTP/SCS and would not substantially increase the severity of impacts previously identified. The 2022 RTP/SCS will address all transportation modes including motor vehicles, public transit (commuter and local), passenger rail, goods movement (rail freight and trucking), bicycle and pedestrian facilities and programs, aviation systems, intelligent transportation systems (ITS), and transportation systems management (TSM) programs and projects within the horizon year of 2042. Specifically, the RTP component is intended to meet the region's transportation goals regarding current and future mobility needs through the identification of policies, actions, and a list of projects which will address these needs. The RTP will guide the development of the Regional and Federal Transportation Improvement Programs (RTIP and FTIP) as well as other transportation programming documents and plans throughout the Shasta Region. The 2022 RTP will include a Sustainable Communities Strategy (SCS) element, as required by California Senate Bill 375, the Sustainable Communities and Climate Protection Act of 2008 (SB 375). SB 375 mandates reductions in regional greenhouse gas (GHG) emissions from passenger cars and light-duty trucks in accordance with targets established by CARB for each of the State’s metropolitan planning organizations (MPOs). As the MPO for Shasta County, SRTA will prepare an SCS that demonstrates how GHG reduction targets will be met through integrated land use, housing, and transportation planning. SRTA will develop several possible growth scenarios to evaluate the effects of various land use and transportation choices and recommend a scenario that meets SB 375 targets of -4.0% for year 2035.