Various techniques are used to slow drivers down

A 12 month study has revealed that the flashing signs have reduced speeds by an average of 6%.

Sixteen signs carrying flashing messages have been installed at a cost of �5,000 each around the county.

They either warn the driver to slow down if they are exceeding the speed limit or flash a warning signal about a bend in the road or crossroads.

They have been generally installed at traffic blackspots or where someone has died in a collision.

Nottinghamshire County Council has been monitoring the signs over the last year and has concluded drivers do take heed and hit the brakes when the signs start flashing.