California Department of Transportation—SR-91 Corridor Improvement Project

State Route 91 in Riverside County has had a long-standing reputation as one of the nation’s worst commutes, with heavy traffic congestion and delays. To remedy this, Caltrans invested $1.4 billion into a corridor improvement project that added a new general purpose lane in both directions, made improvements to six interchanges, provided better access to MetroLink commuter rail lines, allowed the community to more than double express bus service, and improve access to the nearby Santa Ana River Trail, among other things.

Since opening in March 2017, the project has met its goal of significantly cutting down on congestion, as drivers are reporting faster commute times, especially during the afternoon peak hours.