Easy method: Calculate the reaction distance

1. Formula: Remove the last digit in the speed, multiply by the reaction time and then by 3.
2. Example of calculation with a speed of 50 km/h and a reaction time of 1 second:
3. Formula: d = (s * r) / 3.6.
4. d = reaction distance in metres (to be calculated).

It is recommended to keep a reasonable following distance so you can safely stop in a case of an emergency, e.g., if the car ahead of you stops suddenly. A defensive driver maintains a safe following distance of at least three seconds behind the vehicle ahead and increases it depending on weather and road conditions.

Tailgating generally takes place at high speeds. And when you’re travelling at a high speed, your thinking distance will be lower, and your braking distance will be higher. So if you’re driving very close to the car in front at high speed, and you suddenly need to brake, there will almost certainly be a collision.

## What is the effect of tailgating?

Tailgating bunches, creating pockets of traffic that simply put, slow us all down. Some of the worst tailbacks are in fact phantom traffic jams – created only as a result of spontaneous reactions, such as motorists reacting to sudden changes in speed with sharp braking.

## How can we prevent tailgating security?

Security entrances paired with access control devices are the only sure way to mitigate tailgating. Security turnstiles, both waist-height and full-height, are able to address tailgating by closing after each individual who walks through.

## Which action is an example of tailgating?

An example seen in tailgating is an attacker asking staff to “hold the door” to a restricted space as a result of forgetting their entry or id card, and even merely asking staff to borrow their machine.