Question Unless otherwise posted, the maximum speed limit in a school zone is: Answers 30 mph. 20 mph. 15 mph. Explanation The speed limit in a school zone is 15 mph. Drive with extra caution when driving where children or other pedestrians may be present. Pass your DMV Written Test with flying colors Take me to the cheat sheet Mississippi This questions appears in the following tests: Mississippi Practice Test 23 Mississippi Practice Test 23