All northbound lanes were shut down for a couple of hours at North Alameda Street before reopening around 6 a.m.
California Highway Patrol says the victim was a 67-year-old male. He ran into the freeway and was struck twice. They say the victim didn't appear to be a transient and that an investigation was ongoing.
Police have not released details of the driver.
Earlier, abc7.com had titled this a hit and run, though police have not described this accident as a hit and run.