Durfee Avenue Grade Separation Project.
Montebello Boulevard Grade Separation Project.
Nogales Avenue Grade Separation Project.

Interactive Map of ACE Projects

Project Status of the ACE Projects.

Updates and Notices

Recent or Ongoing Construction Notices:

Durfee Avenue to Close Through Traffic on February 3 for 27 Months; Local Access to be Maintained During Roadway Underpass Construction

Roadway Improvements on El Adobe Property to Commence February 7th
Effective: Beginning Monday, February 7, 2022


Upcoming Community Workshop:


East San Gabriel Valley Sustainable Multimodal Improvement Project Public Workshop
Date and Time: Tuesday, May 3, 2022 at 12:00 PM

Upcoming Capital Projects Committee Meeting:


Date and Time: Monday, May 23, 2022 at 12:00 PM
Location: Hybrid (Zoom or In-Person - 21810 Copley Drive, Diamond Bar, CA 91765)


Alameda Corridor-East Project

The San Gabriel Valley Council of Governments (SGVCOG), a joint powers authority comprised of 30 cities and three Los Angeles County supervisorial districts, created the Alameda Corridor-East (ACE) Construction Authority in 1998 to provide direction and oversight of the ACE Project to mitigate the impacts of significant increases in freight rail traffic on over 70 miles of mainline railroad in the San Gabriel Valley. In 2017, the SGVCOG was restructured and the SGVCOG Capital Projects and Construction Committee was established as a successor to the ACE Construction Authority with full responsibility for implementing the ACE Project. The ACE Project consists of a comprehensive program of safety improvements and mobility upgrades at 39 railroad crossings and 19 roadway-railroad crossing grade separation projects at an estimated cost of $1.7 billion. The ACE Trade Corridor is among the state's and nation's busiest rail corridors, carrying 16 percent of all oceangoing containers throughout the entire United States. The grade separations will improve crossing safety, eliminate vehicle delay throughout the local network and locomotive horn noise, and reduce emissions.

Introductory Video


ACE Partners

The U.S. Department of Transportation
California Transportation Commission
Los Angeles County Metropolitan Transportation Authority
California Department of Transportation
Union Pacific Railroad