Caltrans rolls out new carpool hours for Hwy 101 in Marin, Sonoma Co. after public backlashIn the North Bay, new carpool hours are coming to Highway 101 in Marin and Sonoma Counties after an uproar from thousands of commuters who complained the current carpool hours were too long and caused big traffic delays. Clayton is feeling a bit victorious after taking her commute complaints to Caltrans, which changed carpool hours last September. Clayton launched a Change.org petition last summer, which now has almost 9,000 signatures from commuters demanding that carpool hours be changed between Windsor and Sausalito. It's reducing current carpool hours Monday through Friday from 5 a.m. to 10 a.m. to 6 a.m. to 9 a.m. Caltrans said new reduced carpool hours will take effect in late February.