Alameda Corridor-East Construction Authority

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What is ACE?
The ACE Construction Authority is a single purpose construction authority created by the San Gabriel Valley Council of Governments in 1998 to mitigate the impacts of significant increases in rail traffic over 70 miles of mainline railroad in the San Gabriel Valley. Train traffic through the Valley is projected to increase by as much as 160 percent by the year 2020. The ACE Project consists of safety improvements and mobility upgrades at 39 railroad crossings and 22 roadway-railroad crossing grade separation projects in the San Gabriel Valley. The ACE Project will relieve traffic congestion, improve safety and reduce emissions and noise at all rail crossings while helping ensure the San Gabriel Valley's continued economic vitality.
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