Final answer:
Use your four-way hazard lights when your vehicle is disabled or parked off the roadway, but within close proximity to the roadway. Options A and D are incorrect, since using hazard lights while backing or at a railroad crossing is generally not advisable.
Step-by-step explanation:
Four-way hazard lights, also known as emergency flashers, are typically used to indicate that a vehicle is disabled and is stationary in a place where it could pose a risk to other drivers. So, the best time you can use your four-way hazard lights is when your car is disabled or parked off the roadway, but within 10 feet of the roadway (option C). This means that option D (‘Both A and C’) is incorrect since using hazard lights while backing or at a railroad crossing (option A) is not standard practice and may confuse other drivers.
From a broader perspective on road safety, it’s vital to note that understanding how and when to use your car’s safety features, such as hazard lights, plays a crucial role in accident prevention and ensuring the overall well-being of everyone on the road.
Learn more about Use of hazard lights