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Riverside Freeway Projects
SR-91 (SR-241 to I-15) Lane Addition Project

This project adds one general-purpose lane (bringing the total to 6 lanes in each direction) on SR-91 between SR-241 and I-15. Since the SR-91 corridor is one of the busiest in the region, implementation of this project requires constructing the improvements under multiple segments to minimize impacts to the traveling public.

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SR-91 (SR-57 to SR-55) Improvement Project

Caltrans District 12 and OCTA have kicked-off the Project Approval/Environmental Document (environmental review) phase for the SR-91 Widening Project between SR-57 and SR-55. Still in the earliest of planning phases, this potential/proposed project is intended to improve traffic flow and operations in both directions along SR-91 within the cities of Fullerton and Anaheim. This project is funded by OCTA’s Measure M Investment Plan – which was passed by nearly 70% of Orange County voters in 2006.

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SR-91 Westbound Tustin Interchange to SR-55

This project was completed in 2016.
OCTA and Caltrans District 12 relieved congestion and improved operational efficiency on the 91 freeway in the northeastern part of Anaheim by extending a westbound lane from the northbound (NB) SR-55/westbound (WB) SR-91 connector through the Tustin Avenue interchange. In addition, a westbound auxiliary lane from east of the NB SR-55/WB SR-91 connector to the Tustin Avenue off-ramp was reconstructed.

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SR-91 (I-5 to SR-57) Lane Addition Project

This project was completed in 2016.
OCTA and the California Department of Transportation (Caltrans) District 12 added a new, four-mile westbound general purpose lane to State Route 91 between State Route 57 and Interstate 5.

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SR-91 (SR-55 to SR-241) Lane Addition Project

This project was completed in 2012.
The Orange County Transportation Authority (OCTA), in cooperation with the California Department of Transportation (Caltrans) and the Riverside County Transportation Commission (RCTC), added 6 miles in the westbound and eastbound directions to the Riverside Freeway (SR-91) between the Costa Mesa Freeway (SR-55) and Eastern Toll Road (SR-241) in eastern Orange County to reduce traffic congestion.

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SR-91 (SR-241 to SR-71) Lane Addition Project

This project was completed in 2010.
The Riverside Freeway (SR-91) Eastbound Lane Addition Project is the ﬁrst in a series of projects intended to increase capacity, relieve congestion and improve mobility on SR-91. The Orange County Transportation Authority (OCTA), in cooperation with the California Department of Transportation (Caltrans) and the Riverside County Transportation Commission (RCTC), added a lane to the eastbound Riverside Freeway (SR-91) between the Eastern Toll Road (SR-241) in eastern Orange County and the Corona Expressway (SR-71) in western Riverside County.

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