It is kilometre 0 for the measurement of distances (chainage) on all core network lines.

While the passenger traffic of the SBB ends in Chur, there is a connection with the Arosa Railway and there is a link for standard gauge freight operations using a dual gauge (three-rail) section in Untervaz and a dual gauge section (22.5 tonne axle load) for standard-gauge freight traffic from Chur to Domat/Ems for the factory premises of Ems-Chemie and the large sawmill of Mayr-Melnhof Swiss Timber AG.

The line connects at Thusis directly with the Albula Railway, which continues the chainage from Landquart to St. Moritz and continues from Bever on the two branches of the Engadin line to Scuol-Tarasp and Pontresina.

Services at Trimmis station were discontinued at the timetable change on 10 December 2006.

As a result, Untervaz station was renamed Untervaz-Trimmis, which reflects the uneven development of the municipality of Trimmis.