As per the California Highway Patrol Traffic Incident Information page, a two vehicle traffic collision on the northbound side of Highway 101 near the Calpella exit has left the roadway strewn with debris and northbound traffic significantly slowed.
The CHP Incident Information page describes one vehicle as a Chrysler 300 sedan. Scanner traffic indicates efforts are underway to clear the roadway.
UPDATE 4:30 p.m.
As per the CHP Traffic Incident Information page, the roadway is clear and traffic if flowing smoothly