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Tennessee Class D Knowledge Test Practice
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Passing target: 80% (32/40)
Regulatory, Lane & Parking SignsStandalone practice
You drive on a dry, straight road with light traffic and good visibility. A white rectangular sign reads SPEED LIMIT 45. What does the 45 tell you?
Correct answer: 45 mph is the highest speed that you can drive here, even when it is clear.
Why
Speed limit signs are white rectangles because they state a law. The state, cities and counties can post lower limits where safety requires them. On interstate and other controlled-access highways with four or more lanes, the highest limit is 70 mph. A yellow advisory speed plate is different: it recommends a safe speed for a curve or another hazard.
Verified against Tennessee Comprehensive Driver License Manual · Regulatory Signs — Speed limit · p. 51, 52
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