A woman riding a bicycle was struck and killed by a big-rig near Portola Valley Thursday afternoon (Nov. 4), a California Highway Patrol officer said.
The collision was reported at 3:39 p.m. on Alpine Road near the on-ramp to northbound Interstate Highway 280.
Initial reports indicated the bicyclist had been hit by an 18-wheeler and was underneath the big-rig. The San Mateo County coroner's office has been called to the scene.
CHP Officer Art Montiel said the bicyclist appears to be a woman in her 40s or early 50s.
As of about 5:30 p.m., a small stretch of westbound Alpine Road remained closed, Montiel said.
The CHP is interviewing the big-rig's driver and is seeking witnesses to the accident. Anyone with information is encouraged to call 650-369-6261 and ask to speak to Officer Keith Nielsen.