Some drivers already had a game plan for the five-day closure of the Bay Bridge that starts next week, but others did not Tuesday.
Luckily for them, authorities were making plenty of information available to drivers.
In San Francisco, 19th Avenue and Park Presidio all the way to the Golden Gate Bridge was expected to be one of the Bay Area's most congested roadways.
“I just plan out my schedule not to go over to the East Bay...I will use San Mateo Bridge or Golden Gate Bridge and the Richmond Bridge,” said Nevin Ruan of San Francisco.
Rachel Vander, also of San Francisco said, “I'm going to go to work three hours earlier.”
The San Francisco Metropolitan Transportation Commission says in addition to 19th Avenue other areas will likely be congested.
They include the San Mateo Bridge, the Richmond-San Rafael Bridge and Sir Francis Drake Boulevard between San Quentin and the Greenbrae interchange.
“Those are the areas where we may see additional California Highway Patrol deployment," said John Goodwin of the MTC. "And depending on the jurisdiction, maybe more local police on hand to keep traffic moving and prevent backup onto surface streets,”
The website 511.org has real time data that you can see online showing accidents and other trouble spots.
Caltrans will also be monitoring data from roadway sensors in its traffic management center.
Workers will be able to change the timing on metering lights and traffic lights if necessary.
“The people of Bay Area traditionally have responded well to big transportation event like this,” said Goodwin. “They've done so by planning ahead.”
511.org says it has a new traffic data company that taps into crowdsourcing and information from phones and navigation systems as well as road sensors.
Traffic was expected to be especially bad on Thursday, Friday and Monday afternoon, with Friday being the worst between 2:30 pm and 7 p.m.
Watchdogs are questioning an exclusive agreement between the City of Oakland and a non-profit group, tapped to lead a multi-million dollar project to redevelop the area around the Coliseum BART station.