# Directive 2004/54/EC of the European Parliament and of the Council of 29 April 2004 on minimum safety requirements for tunnels in the trans-European road network, Division 3.9: Distances between vehicles and speed

Extent: E+W+S+N.I.

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.

---
Source: https://www.legislation.gov.uk/eudr/2004/54/annex/I/division/3.9 (the official version)
Page: https://openlegislation.uk/eu-directive-2004-54/annex-I/division-3.9
Contains public sector information licensed under the Open Government Licence v3.0. Source: legislation.gov.uk, The National Archives.