Following a convention signed in Rome on 12 November 1918 between the plenipotentiaries Sidney Sonnino and De Segesser, respectively, of the King of Italy and the Federal Council of the Swiss Confederation Switzerland, the construction of the railway began. The railway started with an initiative mainly due to the then Mayor of Locarno Francis Dance. The builders used part of the existing meter gauge Locarno-Bignasco railway at the start of the eastern end of the new line. This set the meter gauge of the whole line. Since then the railway has regularly performed its task of connecting the communities between Locarno and Domodossola. The line continued after the period of mass motorization, when some considered the train to be obsolete. The railway currently plays an important economic and tourist function in the area. It is the shortest and most scenic link between the major trans-Alpine railways that pass through the Simplon and Gotthard tunnels. Combined with the Simplon railway, it provides a fast connection between the Swiss Cantons of Valais and Ticino.
1978 flood
On 7 August 1978, a flood struck the railway causing damage affecting almost 700 meters of track, mainly on the Italian side. Thankfully there were no injuries but reconstruction of the line lasted until the end of the year.
Passengers transported annually between 1982 and 1985:
* 1982 - 896,411
* 1983 - 917,737
* 1984 - 852,381
* 1985 - 869,215
Route
The route, like other mountain railways, has some dramatic inclines between the Masera and Santa Maria Maggiore, and between Verdasio and Intragna ; in some places the gradient is 60 per thousand. A trip between Domodossola and Locarno, takes slightly less than 2 hours. The railroad connects with the Swiss national railway terminals at both ends. At Locarno, trains run frequently to scenic Lugano. The name "Centovalli" derives from the existence of the many valleys along the line upon which are perched small towns. The mountainous geography means that there are many bridges and viaducts to admire on a journey. The trip is exceptionally scenic and negotiates many gorges.
Fares and equipment
Since at least October 2012, there is new rolling stock called the "panoramic train". When taking this train, regardless of the type of ticket held, a supplement of €1,50 or CHF2,00 per passenger is collected, in cash, on board by the conductor. The departure board mentions "supplemento" for runs on the panoramic train. The supplement is not collected on other trains on the route. Although it is an Italian train, the Centovalli fare is included in the scope of the various Swiss Railflat rate and discount passes, as are journeys from Domodossola. The Swiss portion of the line is managed by Ferrovie Autolinee Regionali Ticinesi. On the Swiss side, directional signs and employees prominently display the company's acronym, FART.