Question Unless otherwise posted, the speed limit on country roads is: Answers 25 mph. 35 mph. 45 mph. 55 mph. Explanation When driving on a country road, the speed limit is 55 miles per hour. If a different speed limit is posted, follow the posted speed limit. Pass your DMV Written Test with flying colors Take me to the cheat sheet Oklahoma This questions appears in the following tests: Oklahoma Practice Test 7 Oklahoma Practice Test 10