The Point: Auxiliary lane will help relieve congestion on heavily traveled segment of I-15 The I-15 is a major lifeline for residents and commuters across southern California – connecting cities, major job hubs, cultural centers, and recreational areas. Residents of Temecula and nearby communities experience some of the highest traffic volumes along this corridor, but a recently completed project aims to make travel in this region a little bit easier. On October 1, 2024, the City of Temecula cut the ribbon on the I-15 Congestion Relief Project designed to improve operations and safety on a heavily congested segment of northbound I-15.