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South Dakota Operator License Knowledge Practice Test
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Passing target: 80% (24/30)
Observation, Speed & SpaceStandalone practice
You approach a sharp curve on a two-lane highway, and you cannot see where it ends. When should you reduce your speed?
Blue A approaches a left curve on a two-way highway with double yellow center lines. The curve leaves the crop before its end. An exact official left-curve sign is a reference detail, with no speed value.
Correct answer: Before you enter the curve, so you can use light, steady gas through it.
Why
Slow even more when traction is poor, when you follow other vehicles, or when you cannot see the end of the curve. A yellow advisory speed plate under a curve sign shows a safe speed for good conditions.
Verified against South Dakota Driver License Manual · Speed management · p. 50
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