One place this would definitely be dangerous is in my city in the US. There's an interstate highway with a posted limit of 55mph, but everyone does 70mph+ (ther

One place this would definitely be dangerous is in my city in the US. There's an interstate highway with a posted limit of 55mph, but everyone does 70mph+ (there is no police enforcement, because it's too dangerous---pulling people over here causes more accidents due to rubbernecking and traffic). If you were to actually go the speed limit, you'd be constantly passed (on both sides) by aggressive drivers and cause unnecessary lane switching behind you.