Question Hand or mechanical turn signals must be given: Answers Only in city traffic. Only when there is traffic to the rear of your vehicle. Only when there is other traffic in sight. When changing lanes or turning. Explanation A hand or mechanical turn signal must be displayed for a minimum of 100 feet before a vehicle turns or changes lanes. The signal should be displayed for a longer distance when the vehicle is traveling at a high speed. Pass your DMV Written Test with flying colors Take me to the cheat sheet Alaska This questions appears in the following tests: Alaska Practice Test 13 Alaska Practice Test 11