KTVU - DrIvers on Interstate 80 in Alameda and Contra Costa Counties will notice something new during their trip Tuesday.
Caltrans is activating 43 ramp meters along Interstate 80 in both directions.
They are green from 5 a.m. to 8 p.m. for an entire week.
The lights will then start metering next Tuesday morning.
This is part of Caltrans' Smart corridor project.
Besides the metering lights, there are also electronic traffic warning signs and signs that show variable speed limits, depending on traffic conditions.