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WB SR-91 Project

Project Overview

State Route 91 (SR-91, the Artesia Freeway) is an integral part of the freeway network in Southern California, serving as a major east-west route for those that travel from Los Angeles County to the Inland Empire. SR-91 experiences heavy traffic volumes leading up to and around the SR-91/I-605 interchange, particularly in the westbound direction.  Increases in build-out development, in-fill development and regional population growth will continue to generate additional traffic, further impacting traffic flow and the adjacent communities.  Additional freeway capacity and other improvements will help meet current needs and future demands, and benefit residents, businesses, commuters, and the local and regional economies.

The Los Angeles County Metropolitan Transportation Authority (Metro) and the California Department of Transportation (Caltrans) District 7, in collaboration with the Gateway Cities Council of Governments (GCCOG), the City of Cerritos, and the City of Artesia are proposing to make improvements on the westbound SR-91 between Shoemaker Avenue and the I-605/SR-91 interchange.

The Project is currently in the Project Approval & Environmental Document phase, during which environmental studies related to the project will be conducted.  The anticipated environmental document satisfying the California Environmental Quality Act and National Environmental Policy Act is a Mitigated Negative Declaration/Finding of No Significant Impact.

The Project Area

The proposed project is located in the cities of Artesia and Cerritos.


Under Measure R, $590 million has been set aside for the I-605 Hot Spots Program.  This funding source has been exclusively used for funding the Feasibility Study, the PSR-PDS, and the Environmental Phase.  Future phases will continue using Measure R, and leverage those funds against potential federal, state and other funding sources.

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