Italy (Piemonte) - Lines with Obscure or Sparse passenger services
This list is based on the timetable in force from 15 December 2019 until 13 June 2020. Table numbers quoted here are from In Treno Tutt'Italia, the official Trenitalia timetable. Standard abbreviations are explained in General Information. Map references relate to the Schweers+Wall Atlante ferroviario d’Italia e Slovenia.
Two useful symbols exist which show the booked route for trains not calling at a station: in the middle of the train column, a vertical bar "|" means that the train passes through the station without stopping, whereas a dot "." means that the train does not pass through that station but instead takes a different route.
Bussoleno - Salbertrand
 (18B4-18C4) IT20/51
There are two separate single track lines between Bussoleno and Salbertrand. One runs along the mountain-side and through a series of short tunnels. This is normally used by trains from Bardonecchia towards Torino. The other runs through longer tunnels, which curve deep into the mountains. This gives an easier gradient for trains climbing towards Bardonecchia. However, both tracks are reversibly signalled and trains may use the opposite line from normal.
Collegno (Torino S Paolo) - Torino Porta Susa (Bivio Crocetta)
This west to north curve is used by trains between the Modane and Milano lines, if not booked to call at Torino Porta Nuova. These comprise the TGV trains between Milano and Paris. These trains do not appear in the Trenitalia timetable, but are shown in table 44 of the European Rail Timetable. Reservations are obligatory and can be made on line, but the only station in Italy where this can be done is Milano Porta Garibaldi.
|TGV9241||Paris Gare de Lyon - 10:55 Modane - Milano Porta Garibaldi|
|TGV9245||Paris Gare de Lyon - 14:55 Modane - Milano Porta Garibaldi|
|TGV9249||Paris Gare de Lyon - 18:55 Modane - Milano Porta Garibaldi|
|TGV9240||Milano Porta Garibaldi - 07:39 Torino Porta Susa - Paris Gare de Lyon|
|TGV9244||Milano Porta Garibaldi - 10:11 Torino Porta Susa - Paris Gare de Lyon|
|TGV9248||Milano Porta Garibaldi - 16:11 Torino Porta Susa - Paris Gare de Lyon|
Ceva - Ormea
The regular passenger service over this branch line ceased in 2012, but tourist trains operated from 2016. For further details see the VIC srl website. Most trains appear not to run the full length of the branch. Advance reservation is usually necessary.