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I-5 South County Improvements Project

OCTA, in cooperation with Caltrans, is widening I-5 between SR-73 and El Toro Road. The project will improve 6.5 miles of I-5 through Mission Viejo, Laguna Niguel, Laguna Hills, and Lake Forest.

Project Overview

The $580 million project will add a regular lane in each direction, realign and improve several ramps, reconstruct interchanges at Avery Parkway and La Paz Road, reconstruct the Los Alisos Boulevard bridge, and extend the carpool lane in each direction from Alicia Parkway to El Toro Road.

Alert icon Construction Updates

Project Improvements

For more information on each area, select an image below.

Construction Closures & Detours

Closures and detours for the I-5 South County Improvements Project.

Nighttime Closures

Daytime Closure

Lane Reduction

Long-term Closure

Contact the I-5 South County Improvements Project Outreach Team


If you have questions, please contact the Outreach Team by calling 949-614-0202 or email i5SouthCounty@octa.net

Para obtener más información sobre el proyecto, llame al 949-614-0202 o envíe un correo electrónico a i5SouthCounty@octa.net

Project Partners

california climate investments
cal trans
department of transportation
mission viejo
lake forest
laguna hills
laguna niquel
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