California Highway Patrol officials are investigating a crash on the Bay Bridge that left a San Francisco man dead and stalled traffic for more than an hour Friday morning.

A motorcycle and three other vehicles crashed in the westbound lanes of the Bay Bridge just west of Treasure Island around 10:45 a.m. Friday, said Vu Williams, a CHP public information officer in San Francisco.

The motorcyclist, identified as 49-year-old San Francisco resident Terry Lavern, was taken to San Francisco General Hospital, where he was declared dead.

Lavern’s family has been informed, according to Trish Bubnis, an investigator with the San Francisco Medical Examiner’s Office.

Officials did not receive reports of any additional injuries.

“We’re investigating the sequence of events,” Williams said.

Westbound traffic was blocked for more than an hour and a half while officials conducted a crash investigation and cleared the scene.

*** TRAFFIC ADVISORY ***

Bay Bridge w/b west of Treasure Island lanes 4 and 5 are closed for a collision investigation. Expect delays in area. pic.twitter.com/7hI9mwraSd — CHP San Francisco (@CHPSanFrancisco) September 21, 2018

*** TRAFFIC ADVISORY ***

All lanes now open on Bay Bridge w/b west of Treasure Island — CHP San Francisco (@CHPSanFrancisco) September 21, 2018

Lauren Hernandez is a San Francisco Chronicle staff writer. Email: lauren.hernandez@sfchronicle.com Twitter: @LaurenPorFavor