The ADR tunnel code: B, C, D and E explained

The five categories

A: no restriction. B: restriction for substances that can cause a very large explosion. C: also a large explosion or the release of large amounts of toxic substances. D: also a large fire. E: restriction for all dangerous goods, except a few named substances. The scheme is cumulative: what may not pass a B tunnel may not pass C, D and E either.

The code of your load

The tunnel restriction code is listed per UN number in column 15 of table A in chapter 3.2 of the ADR, and in your transport document. With a combined code such as C/D, the first letter applies to carriage in tanks (and for category D also in bulk), the second to other carriage.

How Truckroute plans with the code

Under Dimensions and weight switch on Dangerous goods and choose the code. With a combined code, tick tank or bulk if that applies. Truckroute then avoids every tunnel prohibited for that code. If you do not know the code, Truckroute uses B, the strictest.

Read also

• ADR tunnel categories of the tunnels in the Netherlands: All Dutch tunnels with their ADR category, from the Coentunnel and the Drechttunnel (C) to the Maastunnel (D) and the Arenatunnel (E).
• Route with an ADR tunnel code: Choose the tunnel code of your load and Truckroute avoids every tunnel prohibited for that code, in the Netherlands, Belgium, Luxembourg and Germany.