Question Unless otherwise posted, the maximum speed limit in a business or residential area is: Answers 20 mph. 30 mph. 45 mph. 55 mph. Explanation When driving in a business or residential area, the maximum speed limit is 30 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 New Mexico This questions appears in the following tests: New Mexico Practice Test 1 New Mexico Practice Test 14