The SR-91 is a heavily traveled east-west corridor through Riverside and Orange Counties, California. Currently, SR-91 includes two tolled express lanes in each direction in Orange County from the Riverside County line 10 miles west to Anaheim. They are managed by the Orange County Transportation Authority. The SR-91 Corridor Improvement Project will extend the tolled express lanes west into Riverside County from the Orange County line to I-15, a distance of approximately eight miles, replacing the existing HOV lanes. The project will also add one general purpose in each direction and make improvements to bridges and interchanges, including the addition of auxiliary or merge lanes for improved access. Direct connectors to/from the express lanes to I-15 south of SR-91 are also included. A total of 32 structures are constructed as part of this project.
Comprehensive quality assurance services as a member of the design-build team, Atkinson / Walsh Joint Venture. The scope includes all structures and roadway inspection and field and laboratory sampling and testing of all structure and roadway materials. An inspection and testing crew of over 22 professionals covers both day and night shift operations.