1999 Oldsmobile Aurora Q&A

1999 Oldsmobile Aurora Question: speedometer stops at 70 mph even if you are doing 90mph

as you decelerate under 70 mph it works fine -
Answer 1
Since the limit, in most cases, is 55 mph, what's the problem? Are there limits over 70 mph in NH.? (I don't know.) How do you know that you were ever going 90 ?? -