Metric signs on roads in the U.S.
Metric and customary speed limit
signs. (Pictures taken 2004 July.) There are many of these signs
on Highway 37 bypass on the northwest side of Mitchell, SD. The
metric speed limits on these signs should have been rounded to
the nearest 5 km/h — 56 km/h should have been 55 km/h and
64 km/h should have been 65 km/h.