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Tennessee Class D Knowledge Test Practice
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Passing target: 80% (32/40)
Freeways & High-Speed RoadsStandalone practice
What is the highest speed limit that Tennessee law allows on a four-lane interstate highway?
Correct answer: 70 mph
Why
70 mph is the highest limit, and many sections, mostly in cities, are posted lower, such as 55 mph. In the left lane of these highways it is also illegal to drive slower than 55 mph, unless traffic prevents it. Drive slower than the limit in rain, fog or heavy traffic.
Verified against Tennessee Comprehensive Driver License Manual · Tennessee Speed Laws — Interstate speed limits · p. 61
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