| S10 | |
| Operator: | Treni Regionali Ticino Lombardia |
| Map State: | collapsed |
The S10 is a railway service that runs every half-hour between and in the Swiss canton of Ticino. Every other train is extended from Chiasso to, in Italy. Treni Regionali Ticino Lombardia (TILO), a joint venture of Swiss Federal Railways and Trenord, operates the service.
The S10 runs every half hour from to, using the Gotthard line. The S10 uses the Ceneri Base Tunnel between and, bypassing the traditional Gotthard route. South of Chiasso, every other train continues to in Italy, providing hourly service between there and Biasca. The S10 and S50 operate as a single train between Biasca and .[1]
The S10 was introduced in 2004 as a regular service between and Chiasso, eventually with a 30-minute frequency.[2] The Between December 2008 and December 2013 the southern terminus was extended to, in Italy.[3] [4] It was again extended Albate-Camerlata in December 2015, and then cut back to Como San Giovanni in September 2018.[5] [6]
The opening of the Ceneri Base Tunnel transformed regional services in Ticino. On 5 April 2021, the S10 and S50 began using the tunnel and bypassing all local stops between Giubiasco and Lugano. The northern terminus moved from Bellinzona to Biasca.[7]