A motorcycle horn: Question A motorcycle horn: Answers Should never be used. Should be used routinely. Should be used if you believe someone may move into your lane. Is ineffective. Explanation Use your signals, lights, lane position, and horn to communicate with other drivers. Your horn should be used in any situation where you need to get someone's attention quickly, such as when another driver is moving into your lane at an unsafe time. This questions appears in the following tests: Utah Motorcycle Practice Test 5