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15 Freeway Auxiliary Lanes Project In Temecula Nears Completion

The additional lanes are intended to improve traffic flow along the Interstate 15 corridor, officials said.

| Updated
The southbound onramp to the Interstate 15 from Rancho California Road in Temecula, California was closed for one week in January 2026 during work related to the I-15 Auxiliary Lanes Project. (City of Temecula)

TEMECULA, CA — The Interstate 15 Auxiliary Lanes Project in Temecula is almost finished, with the new lanes now open to traffic, and final sign and electrical work underway, the city announced Wednesday.

Pending electrical operations will require additional night work at lanes and ramps through the fall, as needed, Caltrans said.

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The $33.8 million project, led by Caltrans, includes three auxiliary lane connections: northbound from Rancho California Road to Winchester Road, southbound from Winchester Road to Rancho California Road, and southbound from Rancho California Road to Temecula Parkway.

RELATED: I-15 Through Temecula Closures Coming: What Freeway Drivers Must Know

The additional lanes are designed to provide more space for motorists traveling between key freeway interchanges, improving traffic flow along the Interstate 15 corridor.

The city announced in January that Caltrans was working to complete the new lanes through Temecula. At the time, the project was ahead of schedule and expected to be finished this year.

More information about the I-15 Auxiliary Lanes Project can be found here.

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