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.

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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

• This Week’s Planned Closures

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.

Archived Construction Alerts

Resources

Fact Sheets

• Fact Sheet – Project Overview from SR-73 to El Toro Road

Aliso Creek Bikeway Closure

• Aliso Creek Bikeway Detailed Detour Map

Construction Notices

• Aliso Creek Bikeway Temporary Closure and Detour

Documents

• Project Handout

Online Meeting Archive