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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.

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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

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

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

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

San Gabriel Valley Council of Governments

(626) 962-9292 | ​1333 S. Mayflower Avenue, Suite 360, Monrovia, CA 91016

For financial documents, staff contact, salary information, and employment opportunities, please visit the San Gabriel Valley Council of Governments website at sgvcog.org.
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Project Description

The project will focus on enhancing transportation infrastructure and safety at two Union Pacific Railroad (UPRR) at grade crossings located at Hamilton Boulevard and Park Avenue in the City of Pomona. Key elements of this project include: 

  • Roadway modifications: Implementing a road diet and install Class 2 buffered bike lanes to close a critical bicycle network gap along Hamilton Boulevard (from Orange Grove to Mission) and Park Avenue (from W. Commercial to 3rd St.)​

  • Railroad Safety Upgrades: Install pedestrian swing gates, pedestrian alert systems, right-of-way fencing and railroad crossing signage to improve safety for both pedestrian and cyclist. 

  • Pedestrian Enhancements: Construct new and enhanced widened sidewalks and add crosswalks and one pedestrian refuge island to improve safety and accessibility. 

  • ADA Accessibility: Install curb ramps compliant with the American with Disabilities Act (ADA) at key crossing points. â€‹

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Project Status

ACE selected a firm in February 2015 to design the proposed at-grade crossing safety improvements. The project is currently at 95% design complete. The design is estimated to be completed in Spring 2025. Total project cost is estimated at $10 million.

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Project Benefits

The project will significantly improve the safety and connectivity in the city. The upgrades will close a critical north-south bicycle network gap and enhance connectivity between downtown Pomona's Key Destinations such as Western University, the Pomona Arts District and County Services such as low income housing, elementary schools, community centers and the Pomona Transit Center. The improvements will ultimately enhance mobility and the quality of life for the residents of Pomona and visitors. 

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