The Riverside County Transportation Commission (RCTC), in partnership with Caltrans, Western Riverside Council of Governments, and the City of Temecula, has implemented innovative technology along the northbound Interstate 15 (I-15) in Temecula and Murrieta that is anticipated to improve traffic operations and enhance travel time reliability for drivers.

Severe congestion occurs along northbound I-15 from the San Diego/Riverside County Line in Temecula to the I-15/I-215 Interchange in Murrieta. This is caused by the high volume of vehicles entering the freeway at the Temecula Parkway, Rancho California Road, and Winchester Road on-ramps, particularly during peak afternoon and evening hours.

The project includes an eight-mile, non-tolled segment equipped with advanced sensors and intelligent transportation system features that continuously monitor real-time traffic conditions. Recently, the project reached a key milestone with the launch of a 90-day baseline data collection period, during which sensors are gathering information on traffic volumes, speeds, and travel times to establish current conditions.

Once the system turns on, adaptive ramp meters will function as a coordinated system, adjusting in real time to allow more or fewer vehicles to enter the freeway. This approach is designed to improve mainline traffic flow, reduce stop-and-go conditions, and enhance travel time reliability. Digital message signs will also display recommended speeds and current conditions along northbound I-15 to help maintain steady traffic flow and improve safety.

While drivers may initially experience short delays at on ramps, the system is expected to result in overall time savings, fewer stops, and smoother travel along the corridor. The system collects traffic flow data only and does not capture photographs, issue tickets, or collect personal information. The pilot project will begin in June and will be evaluated over a two-year period to determine its effectiveness and potential for broader implementation.