Over the course of 9 days, engineering teams worked round-the-clock to replace more than 3.5km of track at locations between Upper Tyndrum and Spean Bridge.
Engineers also carried out works to improve drainage and track over the Nevis Viaduct which support the implementation of a new track design.
While the work was taking place, our staff were transported to the remote work sites by rail from Bridge of Orchy which helped ensure the project was finished on schedule.
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Liam Sumpter, Network Rail route director for Scotland, said: "This investment programme is vital for the future of Scotland's railway.
"The work we have completed helps to provide a more modern railway and will help to improve reliability on the West Highland Line – which is visited by many thanks to its iconic scenery.
"We understand some customers may have experienced some inconvenience while the work was carried out.
"But such a significant investment could not be delivered without temporary disruption and every effort was made to reduce the impact of our activities as much as possible.
"I'd like to thank all passengers and lineside neighbours for their patience and understanding while we completed this essential work."
