I Wonder Why This Number Is Rising So...
Politics0 min ago
No best answer has yet been selected by stanmore. Once a best answer has been selected, it will be shown here.
For more on marking an answer as the "Best Answer", please visit our FAQ.You are not sad, here is a web site dedicated to britains motorways and roads in general.
Here is a site with all sorts of info about british roads
http://math.colorado.edu/~rmg/roads/
The 3/4 mile signs are to the reduced speed limit. This distance is used, because no other standard sign layout for a roadworks system as depicted in the Specification for Highway Works, has a sign at that distance from the works. The are at multiples of miles, 800yds,600yds,400yds,200yds (and on smaller roads)100yds.
I knew working on roadworks for 20 odd years would come in handy some time!!