All fair points for a motorway/highway/freeway/whatever. I'd mistakenly thought the previous post was referring to a smaller local road with a 55mph limit.

I don't really care so much about what speed people do on motorways, but I have a massive problem with people doing 40-60mph in a 20-30mph limit residential area. Bear in mind where I live in the UK, the cars are driving 2 metres from the front door of everyone's houses.