Major works to install a new railway bridge near Carfin will get under way on Saturday.
Network Rail is undertaking the nine-day programme to install a new, longer railway bridge which will enable the construction of a new section of dual carriageway on the A723 beneath the line.
Engineers will work around-the-clock to remove the existing bridge and embankment, install the new pre-fabricated bridge structure and then reinstate the railway.
However the works will bring significant disruption to rail services.
Services between Dalmuir and Motherwell will be extended to start and terminate at Lanark, also calling at Wishaw, Carluke and Lanark.
Services between Milngavie and Lanark will terminate at Motherwell with passengers can travel onto Lanark using Dalmuir-Lanark or Partick-Lanark services.
Passengers wishing to travel to/from Holytown should use replacement buses to/from Motherwell and Wishaw, which will connect with trains at these stations.
And for passengers using the Glasgow Central–Edinburgh via Shotts sevice a limited train service will operate between Edinburgh and Kirknewton. Buses will replace trains for all or part of the journey.