City News

Press Enter to show all options, press Tab go to next option

CALTRANS Begins Highway 78 Pilot to Optimize Speed

Post Date:03/19/2018 7:55 AM
For the next six weeks, motorist on eastbound Highway 78 from Vista Village Drive to Nordahl Road in San Marcos will see a series of electronic signs advising motorists of the appropriate speeds to travel during peak travel periods. The signs are in place to improve traffic flow and are part of a pilot study aimed at synchronizing traffic during rush hour. Highway 78 is one of San Diego County’s congested corridors and the California Department of Transportation is conducting a Variable Speed Advisory (VSA) study, which it hopes could lead to reduced delays on area freeways.
The VSA Pilot Program will test new software to optimize vehicle speeds in areas well known for congestion or traffic incidents. The VSA software uses an algorithm to determine appropriate speed recommendations that will best improve overall traffic flow through a bottleneck and reduce congestion times. The larger percentage of motorists that adjust to the suggested speed, the greater the traffic flow improvement. Results of the project will be reported by CALTRANS in the summer, 2018.


CALTRANS website on the Variable Speed Advisory Pilot Program




Return to full list >>