South Dakota Operator License Knowledge Practice Test
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The posted speed limit is 55 mph. You overtake a bicyclist who rides in the same direction near the right edge of your lane. What is the least space South Dakota law lets you leave?
A approaches a bicyclist traveling near the right edge of its lane. The factual card gives the 55 mph posted limit, without a passing-clearance number.
Correct answer: 6 feet, measured from your right mirror to the bicycle
Why
A bicyclist can swerve around gravel, cracks, or wet spots, and the wind from a fast vehicle can push the rider, so the law requires more space at higher speeds. Slow down as you come up behind the rider, and keep the full space until you are safely past. To make room, the law lets you move partly over the center line or a lane line when you can do it safely.
Verified against South Dakota Driver License Manual · Bicyclists · p. 46, 62
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