Alameda Corridor-East Construction Authority
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Project Overview

Project Goals

  • Increase Safety
  • Improve Mobility
  • Improve Air Quality
  • Foster Economic Vitality
  • Summary

    The Alameda Corridor-East (ACE) Construction Authority is a single purpose construction authority established by the San Gabriel Valley Council of Governments in 1998 to implement a construction program intended to mitigate the adverse impacts at rail-roadway crossings in the San Gabriel Valley of increasing rail traffic along the nationally significant ACE Trade Corridor. Train counts through the Valley are projected to nearly double by the year 2025 as increasing numbers of freight trains carry freight to and from the nation's busiest container ports in the San Pedro Bay.

    The ACE Project is a comprehensive program of constructing grade separations, where the road goes over or under the railroad, and safety and mobility upgrades at 53 crossings in the San Gabriel Valley. Construction has been completed on nine rail-roadway grade separations. Seven grade separations are under construction with three grade separations and five grade crossing safety projects in the design phase. Jump Start safety improvements have been completed at 40 at-grade crossings.

    The project is designed to improve mobility and safety by:

  • Constructing safety improvements at 40 crossings;
  • Constructing grade separations at 19 rail crossings and eliminating 23 grade crossings; and,
  • Reducing the amount of time San Gabriel Valley residents spend waiting at rail crossings.
  • Project Benefits

  • Improves safety at 40 at-grade rail crossings as well as at 19 grade separations in the San Gabriel Valley.
  • Stops 221 annual tons of air pollutants from being emitted in the worst air basin in the nation.
  • Reduces emergency responder and auto/truck traffic delay which is projected to more than triple at San Gabriel Valley crossings between 2010 and 2025 with a near doubling of the number of trains in the same period.
  • Connects the Ports of Los Angeles and Long Beach to the transcontinental rail network creating a faster, more efficient method for distributing an estimated $314 billion worth of trade by the year 2020.
  • Maintains the economic vitality of the San Gabriel Valley by protecting 634,000 existing jobs and the 192,000 new jobs in the San Gabriel Valley projected by 2020.
  • Contributes to continued growth in the national, state and local economy by facilitating expanded trade.


  • For more information about the ACE project, please visit our website at: www.theaceproject.org or contact us at: (888) ACE-1426.