# 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 2.3: In particular, the safety documentation for a tunnel at the design stage shall include:

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

a description of the planned structure and access to it, together with the plans necessary for understanding its design and anticipated operating arrangements,
a traffic forecast study specifying and justifying the conditions expected for the transport of dangerous goods, together with the risk analysis requested by point 3.7 of Annex I,
a specific hazard investigation describing possible accidents which clearly affect safety of road users in tunnels which might occur during the operating stage and the nature and magnitude of their possible consequences; this investigation must specify and substantiate measures for reducing the likelihood of accidents and their consequences,
an opinion on safety from an expert or organisation specialising in this field, which could be the inspection entity.

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Source: https://www.legislation.gov.uk/eudr/2004/54/annex/II/division/2.3 (the official version)
Page: https://openlegislation.uk/eu-directive-2004-54/annex-II/division-2.3
Contains public sector information licensed under the Open Government Licence v3.0. Source: legislation.gov.uk, The National Archives.