
Implementing transit-supportive roadway treatments improves transit speed and reliability. Examples include level boarding, transit signal prioritization and queue jumps, bus only lanes, and signage.


Continued investments in transit will improve travel time, reliability, convenience to make it an attractive option for daily travel. This can encourage more users to shift from Single Occupancy Vehicle, which reduces VMT.
For more details, see CAPCOA, T-27. Implement Transit-Supportive Roadway Treatments, pg. 193-196 and CALTRANS SB743 Program Mitigation Playbook, Transit service improvement, pg. 25-27 for VMT reduction quantification.


Transit-priority improvements should focus on corridors with high ridership potential in disadvantaged communities. Measures such as bus-only lanes and signal priority reduce travel time for transit users, many of whom lack access to a car. Careful community engagement is needed to avoid unintended displacement due to improved access and infrastructure investment.
Requires initial funding to construct, plus ongoing funding for maintenance and operations. Grants and other one-time sources are available (though competitive), and a new regional transit sales tax may provide additional sources of ongoing funding. Funding sources include the Bus Programs – Buses and Bus Facilities Competitive Grants – Low or No Emissions Bus Grants (Federal Transit Administration), the Affordable Housing and Sustainable Communities Program (California Department of Housing and Community Development), the Multifamily Finance Super NOFA (California Department of Housing and Community Development), the Transit and Intercity Rail Capital Program (Caltrans), the Solutions for Congested Corridors Program (California Transportation Commission), the Capital Investment Grants– Small Starts, New Starts, and Core Capacity (Federal Transit Administration), the Surface Transportation Block Grant & Congestion Mitigation and Air Quality Programs (Southern California Council of Governments), the Low Carbon Transit Operations Program (Caltrans), and Measure A from the Riverside County Transportation Commission.

SCAG’s toolkit recommends transit signal priority, queue jumps, and dedicated bus-only lanes, with a focus on equity corridors and high-ridership potential
SunLine’s plan recommends shared bus-bike lanes and re-striping projects on arterials such as Highway 111 and Fred Waring Drive to improve reliability