Imperial Highway and Pioneer Boulevard

Completed I-5 Imperial Highway / Pioneer Boulevard project.

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  • Start Date: 2013

    Completed: August 2019

    Cost: $323 Million

    Project Overview

    The project extended from Silverbow Ave. in the city of Norwalk to the Orr & Day Rd. railroad overhead (south of the Florence Ave. Bridge) on Interstate 5.

    We widened two miles of I-5 to add one High Occupancy Vehicle Lane (HOV) or car pool lane and one general purpose lane in each direction.

    Three bridges were reconstructed to accommodate the widened freeway: The Norwalk-San Antonio Undercrossing, the Imperial Highway Undercrossing and the Pioneer Boulevard Undercrossing.

    The project included shoulder widening, new ramp alignment, concrete median barriers, sound walls, and decorative tile work. We also extended Adoree Street north to Imperial Highway.

    Interchange modifications at Imperial Highway and Norwalk Blvd. / San Antonio Dr. included adding one lane in each direction to the streets with traffic signals to improve traffic flow at the interchanges.

    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.
    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.

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

    Project Benefits

    • Adding car pool lanes
    • Upgrading on and off ramps
    • Enhancing interchange safety
    • Revitalizing our I-5 community

Project Map

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