[sokoloff]

If you're the type to drive no more than 55.00 mph on the highways posted at 55 and with prevailing speeds of 70-75 mph, you're probably doing more harm to society than help, to be honest.

[chrisseaton]

I'm not sure the difference is so extreme in the UK. Our speed limit is 70 mph and most people do that or perhaps 75 mph.