SR-91 Corridor Improvement Project Facts

What is the SR-91 Corridor Improvement Project?

The State Route 91 (SR-91) Corridor Improvement Project focuses on increasing capacity on an existing 12-mile stretch on the SR-91 from the SR-241 to Pierce Street in the City of Riverside. This project is a major element of Riverside County Transportation Commission’s (RCTC) 10-year delivery plan with an estimated construction cost of $1 Billion and is a high priority project within the region.

This segment of SR-91 is one of the most congested routes in Southern California with a current average daily traffic (ADT) of 280,000 vehicles, which is expected to increase 50-70% by the year 2030.

What is the purpose of the project?

The purpose of the proposed SR-91 Corridor Improvement Project is to reduce congestion and improve mobility within the project segments of the SR-91 (between the SR-241 and Pierce Street) and the Interstate 15 (I-15) (between Cajalco Road and Hidden Valley Parkway).

The proposed improvements would facilitate movement of people and goods between Riverside County and Orange County by improving travel conditions for work, recreation, school, commerce, as well as all other trip purposes.

What are the project objectives?

• Increase vehicle, person, and goods movement to more effectively serve the existing and future regional travel demand.
• Reduce traffic delays, travel time, and traffic diversions around the surrounding communities.
• Provide local circulation and ramp improvements.
• Implement improvements consistent with the RCTC 2009 Measure A 10-Year Delivery Plan.
• Reduce air pollution associated with idling vehicles and lower, less efficient vehicle operating speeds.
• Accommodate the Surface Transportation Assistance Act (STAA) National Network for trucks
• Provide system connectivity from I-15 to the SR-91 HOV/toll lanes.

What are the current project alternatives?

The project will include studying two alternatives on the SR-91 from the SR-241 to Pierce Street in the City of Riverside, which is approximately 12 miles long.

One alternative will add one general purpose lane in each direction maintaining the existing High Occupancy Vehicle (HOV) lane. The other alternative will add one general purpose lane and replace the existing HOV lane with the two toll lanes in each direction. It is anticipated that HOV traffic with three or more occupants will have access to the toll lanes at a discounted rate. Both alternatives include widening the existing structures, and the realignment and reconstruction of the existing exits and entrance ramps within the project limits.

The project will also consider direct connectors linking the I-15 to the SR-91 existing HOV lanes and/or proposed toll lanes, which will potentially extend these lanes approximately five miles along the I-15 to Cajalco Road. The following two diagrams demonstrate the current project alternatives:

General Purpose Lanes with HOV Lanes

General Purpose Lanes with Toll Lanes

Who are the project partners?

The Riverside County Transportation Commission (RCTC), in cooperation with the California Department of Transportation (Caltrans), Orange County Transportation Authority (OCTA), Transportation Corridor Agencies (TCA), the Federal Highway Administration (FHWA), Counties of Riverside and Orange, and Cities of Corona, Riverside, and Anaheim are all partners on this project.

Who can I contact about the SR-91 Corridor Improvement Project?

If you have comments or questions about the SR-91 Corridor Improvement Project email us through our website at www.sr91project.info or call Eliza Echevarria, Community Relations Manager for RCTC at (951) 787-7141.