Network Rail has issued a £112 million tender for the redevelopment one of Scotland’s busiest stations, Glasgow Queen Street.
Due to be completed in 2019, the project will include extending platforms to accommodate longer, eight-car trains and enlarging the concourse.
The work is being delivered as part of the £742m Edinburgh-Glasgow Improvement Programme (EGIP).
Phil Verster, managing director of the ScotRail Alliance, said: “This is another tremendously exciting step forward in our plans to transform Scotland’s railway.
“We recently announced our largest ever Train Improvement Plan, which will deliver new trains, thousands of extra seats and great facilities such as at-seat power points and enhanced Wi-Fi across our fleet.”
He added: “Scotland’s railway is about more than running metal boxes up and down the tracks. We are all about using trains to connect people with jobs, businesses with customers and communities with more opportunities to grow and prosper.
“The changes we are making in the coming years will make sure that we have a modern fleet, running on improved infrastructure to and from world-class stations. That is a rail network we can all be proud of.”