Inspecting the Perth-Aviemore railway line from the air
As heavy rain has led to swollen rivers, flooding and waterlogged ground around the country, work is ongoing to help keep Scotland's commuters moving.
BBC Scotland joined Network Rail's national aerial survey specialist to examine the railway line between Perth and Aviemore.
The survey aims to identify any faults which could hamper the safe movement of trains and commuters.
08 Jan 2016