Its many years since I passed my driving test but have noticed over the past year or so that there are a couple of additions on road signs and I dont know what they are for, mainy on motorway or A roads when coming upto a roundabout, its usually a solid black symbol such as a circle, triangle or square on a yellow background, sometime just a black border of that symbol on a yellow sign and quite often its been stuck on so a new addition to the roadsign, anyone know? just curious guys ;)

http://www.highwaycode.gov.uk/signs06.htm (at the bottom)

 

Symbols showing emergency diversion route for motorway and other main road traffic

Cheers mate, thought it was some kind of emergency route. :bow: