Imperial Highway and Pioneer Boulevard


  • Closures

    Weekly Construction Updates

  • Project Information

    Improvements: HOV lane, one mixed-flow lane in each direction, interchange modifications at San Antonio Dr. undercrossing, Imperial Highway undercrossing, Pioneer Boulevard undercrossing, and Orr and Day Road.
    Start Date: 2013
    Completion: *Spring 2019
    Currently: 95% complete.
    Overall Project Cost: $323 Million
    Project Construction Cost: $144.5 Million

    The new Imperial Highway on ramp to northbound I-5 is open.
    The new Imperial Highway off ramp from southbound I-5 is open.
    The new San Antonio Dr. on ramp to  southbound I-5 is open.

    Pioneer Bridge: Construction complete.
    San Antonio Bridge: Construction complete.
    Imperial Highway Bridge: Construction complete.

    Crews are currently constructing:

    • A sound wall along new lanes of I-5 north of Imperial Highway (Photos below from December 11):
    • The new Norwalk Blvd. off ramp from northbound I-5 is complete and opened to the public on November 21. (Photos below from November 27):

      • The median barrier rail along the new lanes of I-5 north of Imperial Highway. (Photos below from October 23, October 30 through December 11):
      • A new median on Norwalk Blvd. north of the San Antonio Bridge. (Photo below from October 23 and November 27):

      The Pioneer Blvd. on ramp to northbound I-5 is permanently closed to allow the addition of lanes to northbound I-5.

      Project Benefits

      • Increasing capacity by widening the freeway
      • Accommodating future projected traffic demands
      • Improving overall traffic circulation
      • Enhancing safety
      • Enhancing air quality
      • Revitalizing our I-5 community



Project Map

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