Is that a good thing if the law doesn't provide a benefit?
I'm sorry to go against the general concensus that speed limits are a bit limp-wristed.
Speed in itself doesn't cause accidents, but it does massively exascerbate the effects of accidents. On the derestricted areas of Autobahnen in Germany there are very few accidents, but the few they do are generally catastrophic and fatal for all involved. Likewise on motorways in the UK. Would you rather have the road closed because the police are investigating a fatality or drive a bit slower and keep a lane open?

