Well you get some pretty dangerous bunching when lorries hit their limiters when overtaking on dual carriageways.Do the many vehicles that already have speed limiters cause problems with safety that outweigh the benefit? For example HGVs limited at 56 mph and coaches limited at 62 mph. Some London buses have speed limiters that can adjust automatically to 20 mph and 30 mph zones. Are these dangerous?
Its safer to overtake quickly. Anyone saying that you shouldn’t overtake clearly hasn’t been stuck behind all the people with more over-reading speedos (or had a lorry right up their jacksie in an average speed 50 because they have a more accurate speedo!).