What is considered a safe following distance behind another vehicle?

Answer: C — At least three seconds.

A safe following distance behind another vehicle is essential for maintaining control of your vehicle and reacting appropriately to sudden stops by the vehicle in front of you. A following distance of at least three seconds is generally considered the minimum safe distance under normal driving conditions. This three-second rule helps ensure that, even if the vehicle ahead stops abruptly, you have enough time to react and begin braking without risking a collision. To apply the three-second rule, select a stationary object, such as a sign or tree, and when the vehicle in front of you passes that object, count the seconds it takes for your vehicle to reach the same point. If you reach the object in less than three seconds, you are following too closely and should increase your distance. In varying weather conditions, or if you're driving a larger vehicle, it’s advisable to increase your following distance even further, ensuring a greater buffer zone for safe stopping.