The four-month programme began in early December and is part of Network Rail’s commitment to running a safe and reliable railway for passengers and freight customers.

Masonry repairs being carried out will future-proof the 161-year-old structure spanning the River Garry.

While engineers work above the road, overnight closures of the B847 will be in place from 11 January until 28 February 2025 between 22:00 and 06:00 Saturday to Thursday, with the main diversion route via Tummel Bridge.

Andy McManus, scheme project manager at Network Rail, said: “The work at Garry Viaduct is essential so we can maintain the structure and keep services on the Highland Main Line safe and reliable.

“We’re investing millions in the Highland Main Line this year, including a £3 million bridge replacement project at Killiecrankie. The 140-year-old bridge over the railway was recently demolished, with a new bridge now in position. Work will be completed there in March 2025.

“We understand the impact this work is having on those living near Garry Viaduct and we thank the community for their patience whilst we carry out this vital project.”

Work at Garry Viaduct is due to be completed on 25 April 2025 and is part of a wide-ranging bridge modernisation programme aimed at increasing reliability and improving performance on Scotland’s Railway.