How many car lengths does the two-second rule give you for every 10 mph of speed?

The two-second rule is a guideline used to maintain a safe following distance between your vehicle and the car in front of you. This technique suggests that for every 10 mph of speed, you should have a following distance that equates to 1.5 car lengths. This means that if you are traveling at a speed of 30 mph, for instance, you would need a following distance of approximately 4.5 car lengths.

This rule is important because it helps ensure that you have enough time to react to any sudden stops or changes in the behavior of the vehicle ahead of you. The calculation of 1.5 car lengths for every 10 mph allows drivers to adjust their following distances based on their speed, thus contributing to overall road safety.

In contrast to this guideline, a distance of 1 car length or options suggesting fewer car lengths would not provide sufficient space for safe stopping, especially at higher speeds. It's crucial for drivers to assess their speed and maintain appropriate distances according to the two-second rule to reduce the risk of accidents.