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Project Overview

Interstate 605 (I-605) and State Route 91 (SR-91), the San Gabriel River Freeway and Artesia Freeway, are major north-south and east-west transportation routes located within LA County and are integral to the Southern California freeway network.

To improve traffic flow along the freeways, 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 improvements along westbound SR-91 between Shoemaker Av and the I-605/SR-91 Interchange, and at the I-605 northbound exit to Alondra Bl.

Proposed improvements include widening the SR-91 by adding one new general-purpose lane in the westbound direction adding auxiliary lanes between local interchanges; improving freeway entrance and exit ramps. Additional improvements are also anticipated on the arterial streets near the freeway ramp intersections.

Project Area

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


Under Measure R, $140 million has been set aside for this project from the I-605 “Hot Spots” Program. This funding source was exclusively used for funding the feasibility study, the PSR-PDS and the environmental phase. Future phases will continue using Measure R funds and will leverage those funds against potential federal, state and other funding sources.

Project Reports

Metro and Caltrans have released the Draft Environmental Document (DED)/Draft Initial Study/Environmental Assessment (IS/EA) for public review and comment:

The purpose of the Draft IS/EA is to identify the potential impacts the project may have on the human and natural environment. Any parties commenting on this Draft IS/EA will be notified of the Final Environmental Document.

Printed copies of the proposed Draft IS/EA and other project information are available for review at the Caltrans District 7 Office, 100 S Main Street, Los Angeles, California 90012, on weekdays from 8am to 5pm. The Draft IS/EA is also available for review at the following locations during normal business hours:

  • Artesia Library, 18801 Elaine Avenue, Artesia, CA 90701
  • Cerritos Library, 18025 Bloomfield Avenue, Cerritos, CA 90703

Public Comments:

Written comments can be submitted via mail or e-mail at the addresses listed below no later than 5pm on August 16, 2018:

Jinous Saleh, Senior Environmental Planner
Caltrans District 7, Division of Environmental Planning
100 South Main Street, Suite MS 16ALos Angeles, CA 90012

Public Hearings will be held in the Cities of Artesia and Cerritos to provide an opportunity to discuss the proposed work with Caltrans and Metro staff and provide public comments:

Wednesday, August 1, 2018, 6 – 8pm
Cerritos Center for the Performing Arts
18000 Park Plaza Dr
Cerritos, CA 90703

Thursday, August 2, 2018, 6 – 8pm
Albert O. Little Community Center
18750 Clarkdale Av, Artesia, CA 90701

All Metro meetings are held in ADA accessible facilities. Other ADA accommodations and translations available by calling 213.922.4091 at least 72 hours in advance.