Final answer:
Your following distance on a high-speed road when behind a large vehicle or motorcycle should be at least three seconds, to ensure adequate time for safe stopping.
Step-by-step explanation:
If you are behind a large vehicle or a motorcycle on a high-speed road, your following distance should be at least three seconds. This three-second rule helps ensure that you have enough time to react and stop if the vehicle in front of you brakes suddenly. It's important to adjust this following distance in adverse weather conditions or when driving conditions are not ideal. For example, if the road is wet or icy, you might want to increase your following distance beyond three seconds to account for the increased stopping distance required.
The concept of the following distance is closely related to the stopping distance, which includes both the reaction distance (the distance your vehicle travels during your reaction time) and the braking distance (the distance your vehicle travels while you are actually braking). Remember, the larger or heavier a vehicle, such as a truck or a motorcycle, the longer it will typically take to stop.