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South Dakota Operator License Knowledge Practice Test
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Observation, Speed & SpaceStandalone practice
After an hour at 80 mph on the interstate, you exit onto a road posted at 45 mph. What does the manual say is the best way to avoid speeding here?
Correct answer: Check the speedometer often; you may be faster than you think.
Why
After a long time at a high speed, your sense of speed adjusts, and 45 mph can feel like a crawl. Glance at the speedometer often instead of trusting your feel. Follow the speed limit signs, which are posted for safety.
Verified against South Dakota Driver License Manual · Controlling speed · p. 29
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