If the car behind you is too close, you should make sure to have more than 3 seconds distance to the traffic ahead.

With a car so close to you, you cannot brake suddenly without risking being hit from behind. Therefore, you need more space and time to see any obstacle ahead of you on the road, and you need more space to slow down if something occurs. You achieve this by keeping a greater distance to the car in front.

You may also need more than 3 seconds distance if your speed is over 80 km/h, or if the road is slippery.