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South Dakota Operator License Knowledge Practice Test
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Passing target: 80% (24/30)
Warning, Construction & Information SignsStandalone practice
You see this sign on a highway in western South Dakota. What does it warn you about?
Correct answer: A steep downgrade ahead, where vehicles build up speed quickly.
Why
Vehicles often build up speed on a long or steep downgrade. Check your mirrors, because heavy trucks and buses may come down the hill faster than you expect. On a steep climb, large trucks slow to about 35 mph and use the right lane.
Verified against South Dakota Driver License Manual · Warning signs · p. 33, 50, 63
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