already searched...Speedo number question...
The national speed limit law enacted in the 70s to theoretically reduce oil consumption.
http://en.wikipedia.org/wiki/5...limit
Since most speedometers measure in 10s, they put 55 on there in a different color for handy reference.
http://en.wikipedia.org/wiki/5...limit
Since most speedometers measure in 10s, they put 55 on there in a different color for handy reference.
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