The US$96m (£71m) contract also includes a four-track rail bridge and a road bridge.
Client for the Fullerton Road grade separation project is the San Gabriel Valley Council of Governments.
The project will lower Fullerton Road under the existing Union Pacific railway tracks between Rowland Street and State Route 60. It is estimated to reduce about 50 vehicle-hours of delay at the crossing each day. At present, the crossing is traversed by 49 trains per day, a figure projected to increase to 91 trains by 2025.
“Skanska is committed to bringing useful, tangible change to our communities, and the Fullerton Road Grade Separation Project is exactly the kind of development we prioritise,” said James Bailey, Skanska USA senior vice president and general manager of civil operations in California. “We look forward to improving this crossing for the betterment of Los Angeles County residents and visitors alike.”
Construction will begin this month, with completion expected in October 2024.