On-Ramp Meters to be Activated on Northbound I-680 in Alameda and Santa Clara Counties Dec. 6, 2022


SANTA CLARA AND ALAMEDA COUNTIES – Caltrans has scheduled to activate ramp meters on northbound Interstate 680 between eastbound East Calaveras Boulevard and State Route 237 in Milpitas and at the Stoneridge Drive interchange in Pleasanton beginning December 6, 2022.

The ramp meters will operate only on weekdays during the afternoon peak period between 2:00 p.m. and 8:00 p.m. The meters will only regulate traffic when congestion develops; otherwise, they will be dark or on continuous green.

On-ramps to be activated:

  • Eastbound E. Calaveras Blvd/Rte. 237
  • Westbound E. Calaveras Blvd/Rte. 237
  • Jacklin Rd.
  • Scott Creek Rd.
  • Mission Blvd./Rte. 262
  • Vargas Rd.
  • Calaveras Rd.
  • Koopman Rd.
  • Sunol Blvd.
  • Bernal Ave.
  • Stoneridge Dr.

On-ramps metering hours extended (to 8 PM):

  • Auto Mall Pkwy.
  • Washington Ave.
  • Mission Blvd./Rte. 238
  • Andrade Rd.

Ramp metering is a traffic management strategy using traffic signals to manage how many vehicles access the freeway at one time. This prevents large numbers of vehicles, commonly known as platoons, from getting on the freeway at the same time and causing congestion. Metering improves the safety of vehicles merging and the flow of traffic on the highway.

During afternoon commute hours, ramp metering helps vehicles maintain optimal travel speeds and improves travel time reliability.


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