to answer the original question i would suggest thinking of cars like you think of guns. if you put restrictions on the speed then criminals would be the only ones who have altered "fast cars", unless only the police were allowed to have those engines, which in america would be cause for riot. also keep in mind there are places on earth with no speed limits, parts of the autobahn (sp?) for example. besides, it is my (unpopular) opinion that speed limits in some places make the roads less safe. the same fucking morons who think it's really safe to slam on their brakes because they see a parked cruiser are the ones who are being "protected' by speed limits. i say get the fuck off the highway if you can't keep up. germany has it FIGURED OUT. you fuck around in germany and your licence is GONE, and getting it in the first place is very expensive. for this common sense they are rewarded with stretches of road where they can drive at high speeds, and the dickwads who go 45 mph in those zones are the ones who get the tickets for going so slow as to endanger other motorists.