Drivers are paying as much as $15 to use some Bay Area express lanes

SAN FRANCISCO - Drivers are paying as much as $15 to use some Bay Area express lanes.

SFGate obtained data showing that drivers paid that much to use Interstate 880 during peak hours.

They found $12 prices along Highway 101 on the Peninsula.

The average toll is about $7. 

Unlike toll bridges, express lanes use variable prices, which spike during during peak congestion hours.

The price can change from minute to minute.