In order to get the lower rate on this bridge for 2+ persons in the car ("Carpool rate") you must have a FasTrak transponder on your vehicle AND use the designated carpool lane(s), AND travel at designated carpool days/times. (See
https://www.bayareafastrak.org/en/ho...shtml#sanmateo ) Cash toll will be $5, payable only Westbound, as
cblaisd posted.