One True Love

Just prior to the BMW crash, it is shown to be driving at a very slow speed (especially compared to the fire department truck), perhaps 10-15 MPH. From a speed of 20 MPH, the car would stop in about 20-30 feet once the brakes were applied. It would not slide the long distance shown and retain enough energy to go through the guard wires on the side of the road.

References La nuit des morts vivants (1968)