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A new GPS device has been launched that will allow drivers to warn each other about mobile speed traps and is apparently legal because of a loophole in the law.

The Mini Coyote requires drivers to press a button on a small dashboard-mounted box whenever they pass a speed trap.

This pinpoints the location and reports it to a central computer, which then alerts other drivers using the system. It’s a modern version of flashing your lights to warn oncoming motorists of a speed trap.Read the full article

Very smart idea.  I got zapped 3 times by speed cameras, twice in germany and once in France, however I only got one notice to pay a 123 euro fine from germany, which i am not going to pay, as I live in the US, never heard back from them again after I told them I was not going to pay the fine.

 However this idea won't work in the US as most speeders are caught by radar used by highway patrol who are constantly on the move. 

It would be good for redlight cameras in the US.