New toll-based express lanes on Highway 101 from Whipple Avenue in Redwood City to Interstate 380 in South San Francisco officially started charging tolls Friday.
The express lanes operate from 5 a.m. to 8 p.m. weekdays.
Express lanes are available for drivers enrolled in the FasTrak system. All customers must have a FasTrak Flex to qualify for free or reduced tolls in the express lanes, as it allows them to disclose how many passengers they are carrying, officials said.
Those without valid FasTrak accounts will be in violation and are subject to fines and penalties.
People driving in carpools with three or more people, as well as buses,