SR-91 Corridor Improvement Project

Status: Completed-Construction

Location: Western Riverside County

Type of Project: Highways

Location: SR-91

Construction: July 2014 to 2017

Investment: $1.4 billion

Jobs Created: 16,200


State Route 91 in Riverside County ranks among the nation’s worst commutes. Approximately 280,000 motorists use this roadway daily between Riverside County and Orange County, and this number is expected to grow to 420,000 daily by 2040.

RCTC, the project’s lead agency, in partnership with Caltrans and the Federal Highway Administration, began construction of this $1.4 billion project in 2014. The project extended the 91 Express Lanes from the Riverside County/Orange County Line to Interstate 15, providing the first tolled express lanes in Riverside County. This design-build project also added general purpose lanes, auxiliary lanes and an Express Lane Connector between eastbound 91 and southbound I-15 and between northbound I-15 and westbound 91. Improvements also were made to interchanges, ramps and local streets. The new lanes opened March 20, 2017.

The 91 Project was designed to save travel time, offer a choice between the new express lanes and general purpose lanes, provide a reliable commute, enhance safety through faster emergency response, improve access to businesses and homes, add jobs, boost connections to transit and trails, and improve air quality.

For information about the 91 Express Lanes and opening an account, please visit