A £60M project to refurbish and upgrade the 1km Glasgow Queen Street tunnel has been completed.
The project took 20 weeks and almost 3,000 engineers renewed 1,800m of concrete slab track and installed more than 4,000m of new rails.
The project has been done ahead of the planned electrification of the main Glasgow-Edinburgh line next year. Other elements completed at Queen Street were the extension of station platforms and alterations of track layouts.
To mark the opening, Scotland’s transport minister Humza Yousaf tightened the final bolts on the new slab-track inside the tunnel.
He said: “This has been an unprecedented project, both in engineering terms and in the scale of the operation required to keep people moving and services diverted via the underground platforms during the works.
“This is a key milestone in our programme of investment for Scotland’s railways and literally paves the way for the introduction of a new generation of electric trains.”
ScotRail Alliance managing director Phil Verster added: “This was a massive engineering challenge and it was only through the careful planning and professional delivery of the project team that we have been able to complete this vital investment in Scotland’s railway ahead of schedule.”
Pictured is transport minister Humza Yousaf views the tunnel works alongside ScotRail Alliance MD Phil Verster (left) and Edinburgh Glasgow Improvement Programme (EGIP) director Rodger Querns