Why do they do it? Because they are idiots. I saw a car overtake another car turning right into Mayow Road by the mini roundabout the other day. The car in front started to turn, the car behind overtook from the outside by driving over the roundabout and entered Mayow Road on the wrong side of the road. I found it quite hard to continue driving with my jaw clanging on my steering wheel. Meanwhile, I am regularly woken by the sound of undercarriages hitting the hump outside my bedroom window.