Division 3.9 Distances between vehicles and speedX1

The appropriate speed of vehicles and the safe distance between them are especially important in tunnels and shall be given close attention. This shall include advising tunnel users of appropriate speeds and distances. Enforcement measures shall be initiated as appropriate.

Road users driving passenger cars should under normal conditions maintain a minimum distance from the vehicle in front of them equivalent to the distance travelled by a vehicle in two seconds. For heavy goods vehicles this distance should be doubled.

When traffic stops in a tunnel, road users should maintain a minimum distance of five metres from the vehicle in front, except if this is not possible due to an emergency stop.