Overview
- The Riverside County Transportation Commission launched the pilot on June 1, 2026, installing algorithm‑managed meters on three northbound I‑15 on‑ramps across an eight‑mile Temecula stretch as part of a two‑year, $33 million test.
- Roadway sensors feed traffic data to an algorithm that times ramp meters and displays suggested merge speeds; officials emphasize the system uses sensors and rules‑based software rather than artificial intelligence.
- Drivers may face longer waits at meters—reports say waits can reach about four minutes—because the system spaces vehicles to reduce stop‑and‑go flow and shorten total travel times.
- The commission frames the pilot as a lower‑cost alternative to adding lanes and will compare travel‑time and congestion results to past successes in Australia and Denver before deciding whether to work with Caltrans on wider rollouts.
- Similar coordinated ramp‑metering efforts cut travel times in other places—Australia reported 35–65% drops and Denver about 20%—so the trial will test whether those gains translate to this known local choke point where peak trips can swell from 10 minutes to 25–45 minutes.