I’ve seen a few, but the one that comes to mind is in Llandudno, the issue with it is its at the end of a relativly long straight, but has a rather sharp bend going into a roundabout. So by playing the “see how can clock the highest” is pretty dagourous, as you then get to play, “who has adequate breaks” straight after.
We have a great 1mile (ish)straight stretch of dual carriageway, bypassing Rhuddlan, with a round about at each end. Nxo cameras, and rather un enforceable, so the younger lot all race there at night. It’s a safe euough bit of raod, and I’ve not heard of any incedents at night. You get a few in the day, but they are usally people driving into the back of people at ether end of the roundabout.
The incedents where you are looking at the roundabout in anticipation, you see the gap, but Thr person in fornt of you doesn’t and then you drive into them as they don’t move and you do.
Learnt that lesson the hard way in my first year of motoring. Luckally my escort van had real metal numbers, unlike the poor Mondeo I rear ended. I didn’t have a scratch, the Mondeo well… Er… Did.
