Bay Area roadways are expected to be jam-packed Friday evening, with a bevy of sports events and concerts on tap, including performances by Jay-Z and Justin Timberlake at Candlestick Park in San Francisco.
Along with the usual commuter traffic, nearly 150,000 are expected to head to San Francisco and Oakland for the events.
Aaron Siuda, vice president of Live Nation Northern California, said that between the Legends of the Summer tour at Candlestick Park, a John Mayer concert at Shoreline Amphitheatre in Mountain View, and A's and Giants home games, "it's a really big week for the Bay Area."
He advised concertgoers to take public transit or carpool. For those braving the roads, he said, "Don't plan on allowing yourself the normal time to get to a concert."
Instead, he advised leaving very early and expecting heavy traffic.
Live Nation has compiled a website with information about parking discounts, public transit options, shuttles and other transportation information. That site is available at ticketmaster.com/jtjzcommute.
California Highway Patrol Officer Art Montiel said extra units will be out on U.S. Highway 101 on Friday.
"It's going to be busy," he said. "We're going to be prepared for that."
San Francisco police spokeswoman Officer Tracy Turner said there will be increased enforcement near AT&T Park and Candlestick Park.
"We're ready," she said.