Unless otherwise posted, the speed limit on interstates is:

35 mph.
70 mph.
45 mph.
55 mph.
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

🟠 This question is challenging37.7% of our users get this question wrong.

Other questions in the same category: Speed Limits
This question appears in the following DMV practice tests: