Starting this evening, one of three lanes at the bridge's toll plaza will be closed at most times while workers install the updated system.
The installation work is set to continue through Dec. 17, outside of weekday peak commuting hours from 3 p.m. to 7 p.m., according to Caltrans and Bay Area Toll Authority officials.
The new toll system is designed to improve the toll plaza's accounting system.
"It gives us more reliability on toll collection and accounting," said Bay Area Toll Authority spokesman John Goodwin.
He described the current system as "ancient by technology standards."
However, the only change drivers are likely to notice will be small - instead of seeing "ETC approved" on toll plaza signs, a display will now read "FasTrak approved," Goodwin said.
The new toll collection equipment was installed at the Benicia-Martinez Bridge toll plaza in August, and is set to be in place on the Carquinez, Richmond-San Rafael, Bay, San Mateo-Hayward and Dumbarton bridge toll plazas next year.