Freeway Projects - I-5 (SR-73 to El Toro Road)

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  • I-5 (SR-73 to El Toro Road)

    Project Contacts 1 of 2
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    For construction closures and detours, click here

    Today, nearly 360,000 motorists travel I-5 daily between the San Joaquin Hills Toll Road (SR-73) and El Toro Road. Transportation planners expect traffic volumes to grow 25 percent by 2045. To address this travel demand, OCTA and Caltrans are working together to implement the San Diego Freeway (I-5) Widening project from SR-73 to El Toro Road.

    Located adjacent to the cities of Mission Viejo, Lake Forest, Laguna Hills and Laguna Niguel, this $580 million freeway improvement project was approved by Orange County voters in November 2006. The project is being built in three segments and includes numerous roadway, structural and operational improvements, including new general purpose lanes, improved intersections and widened ramps.

    Sign up here to stay connected with the I-5 Improvements project construction alerts, surveys and more. 

    ROADWAY

    • New northbound and southbound general purpose lane from Avery Parkway to Alicia Parkway to increase capacity
    • Extension of the second carpool lane from Alicia Parkway to El Toro Road, in both directions

    STRUCTURE

    • Reconstruct two interchanges, as well as widen bridges
    • Modify multiple on- and off-ramps
    • Add new sound and retaining walls

    OPERATIONAL

    • Convert carpool lanes throughout project limits to continuous access, to facilitate entering and exiting throughout the corridor
    • Add new and re-establish auxiliary (merge) lanes, improving merging and diverging
    • Install new overhead signage and lighting
    • Restripe within project limits

    DETAILS

    • LENGTH: 6.5 miles
    • ADJACENT CITIES: Mission Viejo, Lake Forest, Laguna Hills, Laguna Woods, Laguna Niguel, San Juan Capistrano
    • TOTAL ESTIMATED COST: $580 million
    • SCHEDULE: Mid 2019 – 2025

    Aliso Creek Bikeway and Aliso Creek Hiking & Riding Trail Closure

    The Aliso Creek Bikeway and Aliso Creek Hiking & Ridging Trail will be temporarily closed through Spring of 2022. Closure of the trail is required as crews work to widen I-5 over Aliso Creek. Detailed detour maps for cyclists and pedestrians can be found below and downloaded as PDF by clicking here.

    Aliso Creek Bikeway Detailed Detour Map 1


    Detour for the Los Aliso Boulevard and Avenida De La Carlota IntersectionAliso Creek Bikeway Detailed Detour Map 2


    Detour for Los Aliso Boulevard and Rockfield Boulevard intersectionAliso Creek Bikeway Detailed Detour Map 3

    Archived Construction Alerts

    Resources

    Fact Sheets

    Aliso Creek Bikeway Closure

    Construction Notices

    Documents

    Online Meeting Archive

    Resources


    Overview
    header

    For construction closures and detours, click here

    Today, nearly 360,000 motorists travel I-5 daily between the San Joaquin Hills Toll Road (SR-73) and El Toro Road. Transportation planners expect traffic volumes to grow 25 percent by 2045. To address this travel demand, OCTA and Caltrans are working together to implement the San Diego Freeway (I-5) Widening project from SR-73 to El Toro Road.

    Located adjacent to the cities of Mission Viejo, Lake Forest, Laguna Hills and Laguna Niguel, this $580 million freeway improvement project was approved by Orange County voters in November 2006. The project is being built in three segments and includes numerous roadway, structural and operational improvements, including new general purpose lanes, improved intersections and widened ramps.

    Sign up here to stay connected with the I-5 Improvements project construction alerts, surveys and more. 

    Details

    ROADWAY

    • New northbound and southbound general purpose lane from Avery Parkway to Alicia Parkway to increase capacity
    • Extension of the second carpool lane from Alicia Parkway to El Toro Road, in both directions

    STRUCTURE

    • Reconstruct two interchanges, as well as widen bridges
    • Modify multiple on- and off-ramps
    • Add new sound and retaining walls

    OPERATIONAL

    • Convert carpool lanes throughout project limits to continuous access, to facilitate entering and exiting throughout the corridor
    • Add new and re-establish auxiliary (merge) lanes, improving merging and diverging
    • Install new overhead signage and lighting
    • Restripe within project limits

    DETAILS

    • LENGTH: 6.5 miles
    • ADJACENT CITIES: Mission Viejo, Lake Forest, Laguna Hills, Laguna Woods, Laguna Niguel, San Juan Capistrano
    • TOTAL ESTIMATED COST: $580 million
    • SCHEDULE: Mid 2019 – 2025
    Construction

    Aliso Creek Bikeway and Aliso Creek Hiking & Riding Trail Closure

    The Aliso Creek Bikeway and Aliso Creek Hiking & Ridging Trail will be temporarily closed through Spring of 2022. Closure of the trail is required as crews work to widen I-5 over Aliso Creek. Detailed detour maps for cyclists and pedestrians can be found below and downloaded as PDF by clicking here.

    Aliso Creek Bikeway Detailed Detour Map 1


    Detour for the Los Aliso Boulevard and Avenida De La Carlota IntersectionAliso Creek Bikeway Detailed Detour Map 2


    Detour for Los Aliso Boulevard and Rockfield Boulevard intersectionAliso Creek Bikeway Detailed Detour Map 3

    Archived Construction Alerts

    Documents

    Resources


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