Smart truck driver...

A truck driver was driving along on the motorway. A sign comes up that reads "low bridge ahead." He tries to turn off but, before he knows it, the bridge is right there and he gets stuck under it. Cars are backed up for miles...

When a police car comes up. The officer gets out of his car and walks around to the truck driver, puts his hands on his hips and says, "Got stuck eh?"

The truck driver says, "No, I was delivering this bridge and ran out of gas".