Motorcyclist dies in accident on Highway 1 on May 13.

A motorcyclist died in a crash on Highway 1 during rush-hour Tuesday after he slammed into the back of a Comcast pickup that had slowed for traffic, authorities said.

The man was riding a Harley Davidson motorcycle on southbound Highway 1 just before the Morrissey Boulevard exit about 4 p.m. when the crash happened, said California Highway Patrol officer Brad Sadek.

The rider likely didn't see the pickup slow down, and he struck it, Sadek said. The motorcyclist was wearing a helmet but he was pronounced dead at the scene, Sadek said.

The pickup driver was not injured.

The rider's age and name were not released Tuesday afternoon.