Los Angeles drivers are bracing for gridlock as they await President Obama's arrival for a Democratic rally.
Police and the local media have been warning about delays when four major streets around the University of Southern California will be shut for several hours Friday before and after the campus rally.
Obama is on the second day of a two-day swing through California to raise money for the Democratic Party and campaign for Sen. Barbara Boxer.
The president's last visit in August further clogged roads on the city's west side during the evening rush hour when streets were shut as the presidential motorcade moved from the airport to a fundraiser in the Hancock Park neighborhood. Motorists complained of being stuck in traffic for hours.