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A letter code limiting passage through tunnels.
Also known as: Tunnel code ADR, Tunnel category code
In European road transport a tunnel restriction code is a letter, sometimes a pair, restricting which categories of tunnel a load may pass through.
Restricts which categories of road tunnel a load may pass through.
Contexts: Packaging
Applies to the route rather than to the vehicle, which is unusual in a marking system otherwise concerned with what is on board.
Contexts: Packaging
One or two capital letters printed in brackets on the transport document and on tunnel signage.