Unless otherwise posted, the speed limit on interstates is:
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45 mph.
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55 mph.
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70 mph.
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35 mph.
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Explanation
If you are driving on an interstate and do not see a speed limit sign posted, you should drive at or below 70 mph. This speed allows you enough time to react to potential unexpected hazards.
Answer Statistics
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Other questions in the same category: Speed Limits
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