A bicyclist suffered major head trauma after colliding with a car in Redwood City on Sunday afternoon, a California Highway Patrol spokesman said.
CHP officers responded to the collision on El Camino Real north of Fifth Avenue around 4:15 p.m., Officer Art Montiel said.
The bicyclist was transported to Stanford Hospital for major head trauma and the driver of a Honda was not injured, according to Montiel.
A preliminary investigation showed the bicyclist might have ridden off the sidewalk and into the front of the Honda, he said.
The cause of the collision is under investigation, Montiel said.
Anyone who witnessed the collision is asked to call CHP Officer Yair Orona at (650) 369-6261.