Pacific Coast Highway Grade Separation

Project Description/Overview

A half-mile-long bridge that carries Pacific Coast Highway (PCH) traffic over the Alameda Corridor freight rail expressway, a branch rail line and Alameda Street in the Los Angeles port-area community of Wilmington.  The $107 million project was funded by Caltrans ($79 million), ACTA ($14 million) and the Los Angeles County Metropolitan Transportation Authority (MTA, $14 million). It was completed $20 million under budget in March 2004.


The project elevated PCH over two rail lines and Alameda Street to:

  • Improve traffic flow and ease congestion.
  • Reduce emissions from idling trucks and cars.
  • Enhance safety by eliminating conflicts between trains, vehicles and pedestrians.
  • Improve emergency vehicle access.


  • Full-scale construction began: June 1, 2003.
  • Grand-opening ceremony: March 4, 2004.
  • Bridge opened to traffic:  March 5, 2004.


  • Construction required PCH to be closed to through traffic between Terminal Island Freeway (SR-103) and Alameda Street from late May 2003 to March 2004.
  • Access was maintained via a detour using Terminal Island Freeway, Sepulveda Boulevard, Alameda Street, Colon Street and Coil Avenue.
  • Extensive steps were taken to minimize inconveniences to the public, including maintaining access to all businesses, as well as adding and synchronizing temporary traffic signals and turn lanes, and restriping roads to maintain traffic flow along the detour route.