Network Rail has announced a nine-day suspension of services between Perth and Inverness for maintenance and track improvements (link below.)
http://news.bbc.co.uk/1/hi/scotland/highlands_and_islands/7024021.stm

The shutdown has been scheduled to run from 10 to 19 November 2007 , with buses provided as an alternative.

Network Rail said the work was needed to prepare the route for the potential impact of severe winter weather.

Network Rail said buses would be provided during the suspension and Caledonian Sleeper services would be retimed and diverted after Edinburgh to run via Fife to Aberdeen.

Network Rail said there would also be an effect on GNER services and it was working closely with First ScotRail and other operators to minimise disruption.

David Simpson , Network Rail route director for Scotland , said the work has been timed to avoid the tourist season.

Inverness Chamber of Commerce chief executive , Casia Zajac , said the closure would be an "inconvenience".

Ms Zajac said disruption further underlined the chamber's call for the A9 to be converted to dual carriageway. Only certain sections of the road in the Highlands are.

She said: "All transport links are important to the Highland economy and this will come as an inconvenience, but I do understand that we have to maintain what needs to be maintained."

Ms Zajac added that she was not aware of Inverness Chamber of Commerce being advised of the closure so that it in turn could alert the business community.