I use other cars on the road as a sort of way to measure my speed, they never go over the speed limit :)
Drafting cars who stick to the 20mph limit in Richmond Park has really made me question the accuracy of my Garmin.
Car speedometers may legally overread but not legally underread.
Since when did cars obey speedlimits?
Most of those cars probably don't have cruise control and the drivers of the cars which do probably don't know how to use it properly.
@umop3pisdn started
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I use other cars on the road as a sort of way to measure my speed, they never go over the speed limit :)