Contact JLP: 714.835.6355 or info@jlpatterson.com


Alameda Corridor East (ACE) “Gateway to America”
Hamilton Ave Grade Separation Project
Pomona, California

The project corridor consists of 35 miles through Southern California’s San Gabriel Valley between East Los Angeles and Pomona. This area includes approximately 1.9 million residents and 30 municipalities. The project connects the Ports of Los Angeles and Long Beach to the transcontinental rail network, creating a faster, more efficient method of distributing the expected $314 billion in annual trade. The project components include grade crossing improvements (widening 17 roadways and grade separating 25 rail crossings throughout the most heavily used arterials), safety upgrades, mobility improvements, traffic signal control measures, and train traffic volume forecast.

J.L. Patterson & Associates’ involvement with the Hamilton Avenue Grade separation project includes railroad engineering, railroad coordination, shoofly design and railroad safety. The complexity of developing a working shoofly design concept was challenging due to the fact that the Union Pacific’s Los Angeles and Alhambra subdivisions converge at Hamilton Avenue and involve a series of control points (cross overs) in order to move train traffic from one subdivision to the next. In addition to the track restrictions, the shoofly had to consider the impacts to the existing Kinder Morgan oil line to the North of the existing tracks, In order to provide a feasible design JLP is currently developing a shoofly design that maintains the existing Union Pacific operations intact. The shoofly design will be phased in order to accommodate the construction of the railroad bridge at the proposed grade separation for Hamilton Avenue.
Services Provided
  • Railroad Engineering
  • Shoofly Design
  • Railroad Safety
  • Civil Engineering