Massive work on the Monaco train tunnnel is due to start on sept 30th untill 30th march 2014.
Only one line will be operational though the tunnel during the day, which will have knock on effects on trains east -ie from monaco and over to menton.
there will only be 2 trains per hour instead of 4 between monaco and menton
Roquebrune-Cap-Martin station will not be operational at all during this 6 month period and Carnoles station will be used only at peak times.
There will be no effect on stations/train timings west of Monaco [Nice cannes antibes etc]
Timetables will be reased nearer the time