Tunnel Restriction Codes

1.In 2007 ADR introduced new regulations in chapter 1.9.5 regarding tunnel restriction codes. These were subject to a transitional arrangement, which agreed to allow the new regulations to be brought in at a later date. From 01 January 2010 these tunnel restrictions will apply

In Great Britain there are 9 tunnels that have undertaken risk assessments to determine their classification as required by the regulations. The tunnels and category codes are as follows:

Table I

The tunnel category codes consist of an individual letter from "A" to "E" this will be indicated by the use of road signs and or signals. Restrictions will not apply to category "A" tunnels as these are unrestricted and will not require any signage. The tunnel category code assigned by this procedure to each of the above tunnels is only part of the new regulations. (See annex A)

2.Dangerous goods identified by a UN Number in the dangerous goods regulations are assigned a tunnel restriction code applicable to the hazards and dangers they present. These restriction codes are not the same as the tunnel category codes

There are 12 restriction codes, the general rule is that a driver can only transport a load through a tunnel with a lesser code than is applied by the following table.
Category "B" tunnels are the most restricted

Goods such as limited quantities, excepted quantities and loads below certain threshold limits are not subject to these tunnel restrictions

In the case of multi-loads, you choose the most restrictive code and this code will apply then to the entire load

Examples:

If the code "D" applies to the load, it can only travel through tunnels coded B and C

If the code "E" applies the load can travel through tunnels coded, B, C and D

If the goods are packaged goods and the code D/E applies the load can travel through tunnels coded B, C and D

If the goods are tank loads and the code D/E applies the load can travel through tunnels coded B and C

The B1000C and C5000D (the 1000 and 5000 relates to the net mass in kg) codes apply to those Class 1 goods assigned to these tunnel codes and the other codes e.g. B and E can also used for Class 1 goods

Annex A

The tunnel category, assigned in accordance with the regulations by the authority of the UK Government to a given road tunnel for the purpose of restricting the passage of transport units carrying dangerous goods, shall be indicated as follows by means of road signs and signals: