1. Of an object, to move forward until it encounters a barrier of some sort which causes it to stop, or any thing, action or state which can be easily extrapolated from this given an appropriate context. Cited without context, most signers will think this sign means a car hitting an obstacle.
As a Noun
1. An event in which a moving car or other vehicle hits a surface and is badly damaged or destroyed. English = crash (car), smash (car), accident (car), collision (car).
As a Verb or Adjective
1. Of a car or other moving vehicle, to hit something and be badly damaged or destroyed. English = crash, smash, have an accident.