there is a prime example of a road that needs a lower speed limit just outside Oxford - it's a single carriage way country road, with 2 single lane hump back bridges coming very soon after each other, the speed limit on that section of road is already 50mph but in reality it needs to be closer to 30, as there are 2 pubs by the bridges with people coming out of them, kids and children that sort of stuff. Yes the bridges have traffic lights on them but it only takes one numpty going way too fast round the blind bend leading to the first bridge to cause a major crash