This one is particularly bad for lane changing:

https://www.google.com/maps/@51.7874467,-1.278506,17.57z?ent...

Coming out of Oxford on the A4144 there are two lanes; the left lane is for taking the first two turns and the right lane for the remaining three. But, drivers unfamiliar with the layout who haven't seen the markings, or who fancy jumping the queue, will sometimes use the left hand lane to go straight ahead onto the A44. There's a similar situation coming from the A40 to the East.

I've seen a few accidents there and even been involved in one as a result of this (someone tried to undertake me at speed as I exited, and caused a collision, 100% their fault according to our insurers).