Hazard lights
- warn others to be careful when approaching the stopped vehicle ✓
- should be used when travelling at a slow speed
- are used to help the car be seen when driving on a highway
- should be left on whenever you park
Answer: A. warn others to be careful when approaching the stopped vehicle
Hazard lights warn others to be careful when approaching a stopped vehicle.
Why this is the answer
The handbook says the hazard switch makes both turn signals flash together. Those flashing lights signal other road users to use caution around your vehicle, since you may have stopped because of an emergency. Another passage describes hazard lights as a way to let people know you have stopped for an emergency. That matches the choice about warning others to be careful around a stopped vehicle. The passages do not support using them for ordinary slow driving, for visibility while driving on a highway, or whenever you park.
Why the other answers are wrong
- B. should be used when travelling at a slow speed — The handbook gives truck drivers as an example of using hazard lights to warn they are moving well below the speed limit, not a general rule that you should turn them on whenever you drive slowly.
- C. are used to help the car be seen when driving on a highway — Nothing in the passages says hazard lights are for helping your car be seen while you drive on a highway; they are described as a warning that you have stopped for an emergency.
- D. should be left on whenever you park — The passages connect hazard lights with warning others about an emergency stop, not with leaving them on every time you park.
Remember it
Link the flashing pair to an emergency stop: both signals flash to say, "caution around me."