Full News Report

21st October 2025

National Highways: Saltash Tunnel update

Currently, we are testing the technology system – which controls the equipment in and around the tunnel – off site before we bring it to site and test it in the tunnel.

Approximately 70 per cent of the new cabling is in place between the tunnel, bridge and control buildings. This will be completed in the coming weeks and will enable the system to be fully connected.

There will be a pause of the weeknight overnight closures between December 19 and January 2 for the Christmas period.

Tidal flow switch on

We are pleased to confirm the new tunnel control system is expected to be in operation from early in the new year. This will mean the ‘tidal flow’ (which allows lanes to change direction to manage traffic) will come back on.

Once the switch on is complete there will be some further ancillary works taking place on site including installing signs. This work will require further weeknight closures.

As work continues, speed restrictions will remain in place.

More information

As with any complex scheme, dates are subject to change. As we move through the scheme, dates will be announced and kept up to date on our dedicated webpage.

Please check online for the latest information. You can also sign up via the webpage to receive notifications when new information has been added. In addition, you can also check our daily closures page or find live travel information on our Traffic England website.

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Any questions?

If you have any queries or comments about the work, or would like further information please contact National Highways Customer Contact Centre on 0300 123 5000 or by email: info@nationalhighways.co.uk

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National Highways Limited | General enquiries: 0300 123 5000 |National Traffic Operations Centre, 3 Ridgeway, Quinton Business Park, Birmingham B32 1AF | https://nationalhighways.co.uk | info@nationalhighways.co.uk

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