Due to construction work, the track between Poschiavo and Tirano will be closed from 1 to 3 April 2025. From 7 to 14 May 2025, the track between Pontresina and Poschiavo will also be impassable. Replacement buses are running.
The above info was copied from the Rhb website for the Bernina express route Tirano to St Moritz. When looking at the train route map and times, it appears this is about 3/4 of the route by bus. For those of you who might have done this route by train, does the bus follow near the tracks and have the same views? I happen to be traveling in this area the exact week of track repairs, would you forego the train trip? I already purchased tickets, but believe I can get a refund.