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In order to improve mobility through the downtown Riverside area, Caltrans, in partnership with the Riverside County Transportation Commission, is currently preparing to construct one High Occupancy Vehicle (HOV) lane, also called a carpool lane, in each direction of State Route 91 (SR-91) from Adams Street to the 60/91/215 interchange in the City of Riverside.

The SR-91is a primary truck and commuter route and carries approximately 170,000 vehicles per day within the project area on the existing three lanes in each direction. The route is often highly congested at current traffic levels with Riverside County's population expected to reach 3.5 million by 2030, the vehicle pressure in this corridor will continue to increase. The improvements to the freeway through this widening project will help alleviate congestion through this hub. The cost of the project is estimated to be $232 million and is funded by Measure A, Riverside County's half-cent sales tax for transportation; federal funds; and $ 157 million in Corridor Mobility Improvement Account (CMIA) funds, the state Proposition lB funding.

The SR-91 freeway serves the entire inland region as primary freeway connection to communities including Riverside, Corona, and San Bernardino. Over the past few years, significant investments have been made to improve the SR-91 with the reconstruction of the 60/91/215 interchange in Downtown Riverside and the widening of the freeway from Adams Street to the Orange County line.

One section of the freeway that has yet to be widened is the 6-mile segment between Adams Street and the 60/91/215 interchange. The addition of a carpool lane through this area will provide HOV continuity, improve traffic safety and improve the level of service of SR-91 through Riverside. Moreover, the widening of the freeway and its ensuing investment will lead to many other adjacent improvements including improved on and off-ramps at 14th Street and Arlington Avenue, relocating the 9th Street on ramp to 1Oth Street, and the replacement of a number of bridges that cross the freeway such as 14th Street, Cridge Street, and Ivy Street. The overall result will be a state·of·the art transportation facility that serves motorists by adding capacity while easing access to and from the community which better serves businesses, employers and local residents. The project anticipates creating an estimated 1,500 jobs during its construction.

The safety of construction crews, area motorists and pedestrians is the highest priority of this project. Please follow these safety tips near the SR-91construction zone:

bullet Slow down and watch for construction workers and heavy equipment.
bullet Allow extra time to get to work, school or appointments.
bullet Tell friends or customers coming to your home or business about construction work.
bullet Be extra careful when driving at night and in rainy weather.
bullet Immediately report to the police any suspicious activity or children playing in construction staging areas.
bullet Avoid using your mobile phone or other distractions when driving through this area.
bullet Watch for ramp closures and use alternate routes.
bullet Be patient. Please remember that this is a temporary inconvenience for a long-term solution to traffic congestion.

Delivering a transportation project to the public takes place over a period of several years. Work began on the SR-91 HOV project in 2006 with the completion of the project study report. The Project Report and Environmental Documents were completed in August 2007. Final Design is now complete and Construction is expected to begin
in Spring 2012; completion in 2015. Construction will be phased along the project corridor in order to minimize disruptions to traffic.

RCTC and Caltrans are working closely with the City of Riverside to deliver this project.


Project Contact:
bulletShelli Lombardo, Caltrans Public Information Officer 909.383.6290 |
bulletDennis Green 909.800.045 I

Project Website: