The distance you can expect to cover is the number of hours you drive multiplied by your average speed. You're driving on the road, looking in the rearview mirror and realizing that the car behind you is too close. If you need to stop abruptly, they're sure to hit you in the back. This situation can be frustrating and dangerous, which is why it's so important to leave enough space for the cars around you.
But what is a safe tracking distance?.