Guidance
Transporting dangerous goods: ADR tunnel categories
Categories for tunnels in Great Britain when transporting dangerous goods.
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Details
Tunnels in Great Britain are given a category from A to E to control the transport of dangerous goods through them.
Category A tunnels are considered low risk which means there are no restrictions when transporting dangerous goods through them.
Category E marked tunnels are considered to be high risk, which means very few dangerous goods are allowed to be transported through them.
This guide lists the tunnels and gives their category.
Updates to this page
Published 1 January 2010
Last updated 7 March 2025
show all updates
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Silvertown Tunnel under the River Thames is due to open 7 April 2025.
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Tyne Tunnel changed from ADR category D to category C.
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First published.