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What is the unposted default speed limit on Kentucky interstate highways and parkways?
The answer
Answer: A. Under Kentucky law, when the speed limit is not otherwise posted, the statutory speed limit on interstate highways and parkways is 65 miles per hour. Drivers must adjust their speed downward when adverse weather, traffic congestion, or construction zones demand slower speeds. The sixty-five miles per hour limit applies to standard conditions on Kentucky interstates and parkways unless posted lower by highway signs.
Source: KY Driver Manual — Section Eight: Safe Driving Tips (p. 49)