Guidance

Transporting dangerous goods: ADR tunnel categories

Categories for tunnels in Great Britain when transporting dangerous goods.

• From: Department for Transport
• Published: 1 January 2010
• Last updated: 7 April 2025
  Show all updates

  1. 7 April 2025

     Silvertown Tunnel opens.

  2. 7 March 2025

     Silvertown Tunnel under the River Thames is due to open 7 April 2025.

  3. 24 July 2024

     Tyne Tunnel changed from ADR category D to category C.

  4. 1 January 2010

     First published.

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Transporting dangerous goods: ADR tunnel categories

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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.