To determine when you should pass a vehicle that you are following, consider the following information:
- If the vehicle is traveling exactly at the speed limit (Option A), it means the vehicle is complying with the legal speed. Passing a vehicle that is already at the speed limit is generally unnecessary and might expose you to higher speeds, which could be dangerous and illegal.
- If the vehicle is traveling over the speed limit (Option B), it implies that the vehicle is already traveling faster than what is legally permitted. Passing such a vehicle would require you to exceed the speed limit even more, which is both unsafe and illegal.
- If the vehicle is traveling below the speed limit (Option C), it means the vehicle is moving slower than what is legally permitted but within the safe and legal bounds of traffic. In this case, passing the vehicle can be safe and legal as long as you follow all other traffic rules, ensuring your speed does not exceed the speed limit.
- The option precisely 15 mph (Option D) is not a standard or practical condition for deciding to pass a vehicle, as it should be based on the speed limit rather than a fixed numerical value without context.
Therefore, the most appropriate and correct condition under which you should pass a vehicle that you are following is when it is traveling below the speed limit.
So, the correct choice is:
OC) below the speed limit.
