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

Skip navigation Reduce Motion High Contrast Careers Contact Us
Skip to main content
  • I-5 (SR-73 to El Toro Road)

    Project Contacts 1 of 2

    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. Once construction begins, the project will be built in three segments and include numerous roadway, structural and operational improvements, some of which are highlighted below:

    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 started on the Sienna Segment (aka Segment No. 2) in mid-2019.

    Construction on the Orange segment, from approximately SR-73 to Oso Parkway, is estimated to start in early 2020.

    Construction on the Palm segment, the project’s northernmost segment, is planned for mid-2020.

    Project Area Map

    Weekly Ramp and Lane Closure Alerts

    Resources

    Fact Sheets

    Documents

    Resources


    Overview

    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. Once construction begins, the project will be built in three segments and include numerous roadway, structural and operational improvements, some of which are highlighted below:

    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

    Details

    Construction started on the Sienna Segment (aka Segment No. 2) in mid-2019.

    Construction on the Orange segment, from approximately SR-73 to Oso Parkway, is estimated to start in early 2020.

    Construction on the Palm segment, the project’s northernmost segment, is planned for mid-2020.

    Project Area Map

    Resources

    Resources

    Fact Sheets

    Documents

    Documents

    Resources


    Stay Informed

Overview Tab Content:

Details Tab Content:

Detours Tab Content:

Gallery HTML Tab Content:

Stay Informed Form (defined by 'ekfrm' parameter in URL):

Get Connected