Dual unit distance signs on US Highway 16 southwest of Rapid City, SD. Photos courtesy of Jim Elwell, (left photo) & (right photo). Dual unit speed limit signs on US Highway 16 southwest of Rapid City, SD and at Buffalo Gap National Grassland, east of Rapid City. The metric speed limits on these signs should have been rounded to the nearest 5 km/h—48 km/h should be 50 km/h, 72 km/h should be 70 km/h, and 88 km/h should be 90 km/h. Photos courtesy of Jim Elwell, (top photos) & (bottom photo).
Mitchell
Metric and customary speed limit signs. There are many of these signs on the 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. Photos taken in .
Sioux Falls
Dual unit speed limit signs on West 12th St, Sioux Falls, SD. Photo courtesy of Chloe Dondlinger, .
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