Provisions for road signs and notification of restrictions
Contracting Parties shall indicate tunnel prohibitions and alternative routes by means of signs and
For this purpose, they may use signs C, 3h and D, 10a, 10b and 10c and signals according to the
Vienna Convention on Road Signs and Signals (Vienna, 1968) and the European Agreement
supplementing the Convention on Road Signs and Signals (Geneva, 1971) as interpreted by the
Resolution on Road Signs and Signals (R.E.2) of the UNECE Inland Transport Committee Principal
Working Party on Road Transport, as amended.
In order to facilitate international understanding of signs, the system of signs and signals prescribed in
the Vienna Convention is based on the use of shapes, and colours characteristic of each class of signs
and wherever possible, on the use of graphic symbols rather than inscriptions. Where Contracting
Parties consider it necessary to modify the signs and symbols prescribed, the modifications made shall
not alter their essential characteristics. Where Contracting Parties do not apply the Vienna
Convention, the prescribed signs and symbols may be modified, provided that the modifications made
shall not alter their essential intent.
Traffic signs and signals intended to prohibit access of vehicles carrying dangerous goods to road
tunnels shall be affixed at a place where the choice of alternative routes is possible.
When access to tunnels is restricted or alternative routes are prescribed, the signs shall be displayed
with additional panels as follows:
No sign: no restriction
Sign with additional panel bearing the letter B: applies to vehicles carrying dangerous goods not
allowed in tunnels of category B;
Sign with additional panel bearing the letter C: applies to vehicles carrying dangerous goods not
allowed in tunnels of category C;
Sign with additional panel bearing the letter D: applies to vehicles carrying dangerous goods not
allowed in tunnels of category D;
Sign with additional panel bearing the letter E: applies to vehicles carrying dangerous goods not
allowed in tunnels of category E.
Tunnel restrictions shall apply to transport units for which an orange-coloured plate marking in
accordance with 5.3.2 is required, except for the carriage of dangerous goods for which ‘(-)’ is
marked in Column (15) of Table A of Chapter 3.2. For the dangerous goods assigned to UN Nos.
2919 and 3331, restrictions to the passage through tunnels may, however, be part of the special
arrangement approved by the competent authority(ies) on the basis of 188.8.131.52. For tunnels of category
E, they shall apply also to transport units for which a marking in accordance with 3.4.13 is required or
carrying containers for which a marking in accordance with 3.4.13 is required.
Tunnel restrictions shall not apply when dangerous goods are carried in accordance with 1.1.3, except
when transport units carrying such goods are marked in accordance with 3.4.13 subject to 3.4.14.
Restrictions shall be published officially and made publicly available. Contracting Parties shall notify
the secretariat of UNECE of such restrictions and the secretariat shall make this information publicly
available on its website.
When Contracting Parties apply specific operating measures designed to reduce the risks and related
to some or all vehicles using tunnels, such as declaration before entering or passage in convoys
escorted by accompanying vehicles, such operating measures shall be published officially and made
NOTE: For the purposes of this Chapter, security means measures or precautions to be taken to minimise
theft or misuse of dangerous goods that may endanger persons, property or the environment.
All persons engaged in the carriage of dangerous goods shall consider the security requirements set
out in this Chapter commensurate with their responsibilities.
Dangerous goods shall only be offered for carriage to carriers that have been appropriately identified.
Areas within temporary storage terminals, temporary storage sites, vehicle depots, berthing areas and
marshalling yards used for the temporary storage during carriage of dangerous goods shall be properly
secured, well lit and, where possible and appropriate, not accessible to the general public.
Each member of a vehicle crew shall carry with them means of identification, which includes their
photograph, during carriage of dangerous goods.