The West Highland Line from Crianlarich and Fort William is to be closed for nine days during the work.
Ivan Meyer had left his home in Edinburgh and travelled by to Crianlarich in Stirlingshire on Monday.
David White, from Sheffield, died when his lorry overturned on the A82 in Stirlingshire, police say.
The 61-year-old lorry driver was pronounced dead at the scene after the crash between Crianlarich and Tyndrum.
Network Rail Scotland say sections of the West Highland Line were badly damaged after heavy rain.
A woman had to be rescued after a 100-tonne landslide hit a Highland road, leading to a 113-mile diversion.
Killin Mountain Rescue Team say the casualty was pronounced dead on Ben More, near Crianlarich.
The yellow "be aware" alert follows storms and downpours over parts of Scotland on Sunday.
Police Scotland's Dive and Marine Unit attended Falls of Falloch near Crianlarich, Stirling.
