My current Roadmaking pet hate - there's big new roundabout leaving Newport Pagnell. It's 3 lanes approaching the roundabout from the Newport Pagnell side with straight ahead, left and right, all 2 lanes.
So the lefthand lane is left - or straight ahead exiting into the slow lane
The middle lane is straight ahead only, exiting into the "fast lane"
The right hand lane is right only.
These markings are clear and obvious
on the roundabout itself
However, the road markings as you approach the roundabout, (there is no sign) show all three lanes as straight ahead
It's only been open for a year but there's already been plenty of crashes (mainly right hand lane wanting to go straight ahead and cutting the person in the middle lane up)