New Jersey Permit Test 14 Question The speed limit in any alley is: Answers 20 mph. 15 mph. 25 mph. Explanation The speed limit in any alley is 15 mph. This is always the speed limit, whether or not it is posted. Answer Statistics 14.12 % of our users get this question wrong. This questions is relatively Easy. New Jersey Permit Test This questions appears in the following tests: California Practice Test