Photo
 Photo
TOP - This photo shows the arrowhead type locking bar attached to a cars' tank. In this case the clamp has released the locking bar so the car is departing uphill.
 
BOTTOM - This car is at rest at the bottom of the incline with its locking bar held by the clamp. The red coloured rods are moved by a driver to release the clamp just prior to departing uphill.
 Internal link          Internal link
 Image