The southbound train hit the unoccupied vehicle at the Mary Avenue crossing just before 5:30 p.m., according to Caltrain.
The 355 passengers on board the train were not injured. Transit police are investigating what caused the crash.
As of about 5:40 p.m., trains were stopped in both directions in the area.
273 holding @ SUN 375 hold @ LAW 277 hold @ LAW 279 hold @ SCL 366 hold @ SAT 364 hold @ CAL 268 hold @ PA 370 hold @ MPK #Caltrain— Caltrain (@Caltrain_News) January 12, 2016
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Safety and inspection teams en route. Trains still stopped both directions as we assess potential damage to locomotive. #Caltrain— Caltrain (@Caltrain_News) January 12, 2016