The layout of Langwies station appears to be incorrect. Starting at the station building, TSW has the following: - Track 1 is a siding, accessed only from the Chur direction - Track 2 is a through road, used by trains from Arosa to Chur - Track 3 is a through road, used by trains from Chur to Arosa The platform is (correctly) between tracks 1 and 2, meaning that a train in track 3 is not at the platform. An online image search shows that track 1 is also a through road, and has access from the Arosa direction with the siding continuing off. Based on the timetable, Langwies is not normally used for passenger trains to cross, and pictures suggest that track 2 is the main passenger track in both directions; but track 1 is available when needed for passenger trains to cross. Track 3 should only be used for goods trains. Currently TSW uses track 3 for passenger trains from Chur towards Arosa.
