Now this it what we need. 
We spend thousands in this country installing electronic devices to stop us hitting bridges and this is all it really needs 
There are drivers out there where the sign should read, “After you have hit this sign you will hit that bridge.”
Saw a dead brain in a van drive under a car park barrier two weeks ago, large scraping sound did not stop him, air vent did, well almost, he put some extra revs on & ripped it off.
Best bit was he turned around & did it all over again without even having a rest.