Depending on where you live and the sorts of roads you drive, accidents often come from corners/junctions/road conditions/acceleration etc rather than just MAX_SPEED.
A speed limiter is an incredibly one dimensional tool to try and modify accident chance.
i can imagine quite a few situations where any reasonably small limit on speed would end up in horrible crash (ie overtaking trucks in single lane mountain roads)
A speed limiter is an incredibly one dimensional tool to try and modify accident chance.