Final answer:
When following another vehicle, it is recommended to use the "two-second rule" which means maintaining a distance that takes approximately two seconds to reach the same point as the vehicle in front of you.
Step-by-step explanation:
When following another vehicle, it is recommended to use the "two-second rule" to maintain a safe distance. This means that you should keep a distance that takes approximately two seconds to reach the same point as the vehicle in front of you. The actual distance in feet will depend on the speed at which you are traveling.
For example, if the vehicle in front of you passes a landmark and it takes you two seconds to reach that same landmark, you are following at a safe distance. This distance will increase as your speed increases.
To calculate the distance in feet, you can use this formula: Distance (in feet) = Speed (in feet per second) x Time (in seconds).