This (see quote), plus when leaving a 70mph motorway and arriving at 40 mph sign on the slip-road, as well as the lack of GPS in tunnels etc is a big issue, and already experienced by some Tesla drivers (and those following behind).
Originally Posted By Felix42
I was on a 70 mph duel carriage way when I went under a bridge on which the speed limit was 40 mph. The speed limiter registered this and banged the brakes on very hard.