The Monte Ceneri Rail Tunnel is a railwaytunnel in the Swisscanton of Ticino. The tunnel is situated under the Monte Ceneri Pass that separates the north of the canton around Bellinzona from the south of the canton around Lugano. It forms part of the Swiss Federal RailwaysGotthard line, between Giubiasco and Rivera-Bironico stations. The tunnel comprises two bores, built at different times. The first bore, sometimes known as Monte Ceneri I, was opened on 10 April 1882 and is 1,675 metres (5,495 ft) in length. The second bore, Monte Ceneri II, was opened on 18 October 1933 and is 1,692 metres (5,551 ft) in length. Both bores carry a single standard gauge (1,435 mm or 4 ft 8+1⁄2 in) track electrified at 15 kVAC 16 2/3 Hz using overhead catenary.[1][2]