What have insurance companies and thieves in common?

Maybe there is a reader out there

who can explain this road sign? 

A new coffee shop has opened close to this bridge; it means there are constantly vehicles parked on both sides of the bridge which has a single white line the length of it. The rules of the road seem to suggest such parking on a bridge with a continuous white line is illegal; such parking is certainly unsafe and causing concern to residents.

On the subject of cars and traffic; the owner of a motorbike shop was overheard saying that insurance companies are as good at stealing as are the honest-to-god thieves.

It’s worth a thought.