San Gabriel Valley Council of Governments

(626) 962-9292 | ​4900 Rivergrade Road, Suite A120, Irwindale, CA 91706

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Brea Canyon Road

Grade Separation Project

Cities of Diamond Bar and Industry

Project Description

The Brea Canyon Road Grade Separation Project eliminates traffic delays at the train tracks and potential collisions with trains by routing trains on a railroad bridge and vehicles on a roadway underpass. Brea Canyon Road was lowered as were Washington Street and Currier Road at their intersection with Brea Canyon Road. The new road passes below the railroad tracks and includes pedestrian and motorist safety improvements, walkways, and landscaping.

Project Benefits

Construction of the $73.9 million project began in July 2006 and was re-opened to traffic on October 31, 2008. The project:


  • Eliminates the railroad crossing at Brea Canyon Road

  • Eliminates the dangers of collisions between trains and vehicles and traffic snarls for motorists on Brea Canyon Road

  • Reduces pollution caused by idling cars and trucks

  • Eliminates train horns and crossing alarms with removal of the grade crossing

  • Improves property values in the area

  • Subcontracted approximately 9% of project construction budget to disadvantaged businesses

  • Employed 1,229 construction workers

  • Distributed 16,339 ACE student safety program kits at eight schools in the area

  • Had 0 days lost due to injuries

Brea Canyon Road Grade Separation Ribbon Cutting Ceremony (February 20, 2009)

Please see below for the highlights of the Ribbon Cutting Ceremony.

For more project information, please call the Project Helpline at (888) ACE-1426.