Question A driver should: Answers Always use turn signals when changing lanes. Only use turn signals if there is a vehicle next to them. Not use a turn signal if a lane change is obvious. Explanation Always signal before turning or changing lanes to ensure that other drivers are aware of your intentions. Take a FREE Practice Test Now This questions appears in the following tests: Kentucky Knowledge Test Class A , Louisiana Knowledge Test Class A , Arizona Knowledge Test Class B , New Mexico Double , Maryland Passenger ,