Final answer:
The 3 second rule is a guideline for drivers to maintain a safe following distance, providing ample time and space for reaction and stopping in case the vehicle ahead comes to a sudden halt.
Step-by-step explanation:
The question asks whether the 3 second rule helps a driver determine a safe following distance. The answer is True. This rule of thumb is used to keep a safe distance while driving by ensuring that when the car in front of you passes a certain point, such as a sign or pole, you should not pass the same point before you can count to three seconds. This strategy is intended to provide enough time and distance for a driver to react and stop safely in case the car in front stops suddenly.
Understanding the relationship between speed and stopping distance is crucial, as reaction time plays a significant role in safety on the roads. This is because a car will continue to travel the distance covered during the driver's reaction time before any braking action begins. Thus, maintaining an adequate following distance through the 3 second rule is critical.