Question Unless otherwise posted, the speed limit on a non-hard surface county road is: Answers 40 miles per hour. 45 miles per hour. 50 miles per hour. Explanation The speed limit on a county road without a hard surface is ordinarily 50 miles per hour. If another speed limit is posted, follow the posted limit. Pass your DMV Written Test with flying colors Take me to the cheat sheet Nebraska This questions appears in the following tests: Nebraska Practice Test 16 Nebraska Practice Test 17