https://www.cornish-times.co.uk/news/national-highways-looks-to-upgrade-technology-in-saltash-tunnel-631700
As part of a multi-million-pound investment in road maintenance across the South West
https://www.cornish-times.co.uk/news/national-highways-looks-to-upgrade-technology-in-saltash-tunnel-631700
National Highways looks to upgrade technology in Saltash tunnel
www.cornish-times.co.ukAs part of a multi-million-pound investment in road maintenance across the South West