Visual estimates OK for speeding tickets

[02mingryGT]

Cars need black boxes. This would solve all these problems. You get pulled over and the cop says you where speeding...you open the menu on your nav system that shows your last recorded speed limit over the last 100 miles and show him that in fact you where going 2 under the limit.

Of course, if this technology was ever created, the gov' would surely shoot it down.

OTR truckers already have these.