Interstate 680 Ramp Metering Implementation
KAI acted as an extension to Caltrans staff for the implementation of ramp metering on 22 miles of southbound I-680, between Stoneridge Drive in Pleasanton and East Calaveras Boulevard (SR 237) in Milpitas. KAI collected count data, developed a ramp metering plan, developed meter controller volume-density settings, and coordinated the review of the ramp metering plan with local agencies. KAI held meetings with affected local agencies to discuss how the effects of metering on local streets would be monitored. KAI, jointly with Caltrans staff, developed and executed the ramp metering monitoring and evaluation plan, and was also responsible for conducting the before and after studies.