Tennessee Class D Knowledge Test Practice
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Passing target: 80% (32/40)
You drive on a rural interstate with a 70 mph limit. Heavy rain makes it hard to see, and water lies on parts of the road. What speed does the Tennessee manual call for?
A is on a rural interstate in heavy rain with standing water. The question card supplies only the stated 70 mph limit and weather.
Correct answer: A safe speed below 70, because the limit is only for ideal conditions
Why
A posted limit is the maximum for good conditions, not a target speed. The manual's basic speed rule tells you to consider traffic, the road surface, visibility and weather, and to be able to stop within the clear distance ahead. Standing water can also cause hydroplaning, so slow down early and avoid sudden steering or braking.
Verified against Tennessee Comprehensive Driver License Manual · Adjusting Speed — Weather and road conditions · p. 60, 61, 89
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