[2] Today, the system is the largest in Switzerland; it is supplemented by the Lausanne Metro, and by various conventional bus routes.

The system is operated by Transports publics de la région lausannoise (TL) – formerly Tramways Lausannois – and comprises 10 trolleybus lines, serving not only Lausanne, but also the neighbouring municipalities of Le Mont-sur-Lausanne, Lutry, Paudex, Prilly, Pully and Renens.

Following some line closures, the system no longer serves Cugy, Epalinges and Froideville.

In 1938–1939, a number of additional lines were opened, and between 1938 and 1964 the system gradually replaced the Lausanne tramway network.

[4] Upon its opening in 1932, the Lausanne system had just three trolleybuses, manufactured by FBW / SWS and fitted with electrical equipment by BBC.

Also manufactured by FBW, they were 9.35 m (30.7 ft) in length, had 22 seats and 31 standing places, and remained in service until 1976.

In 2001–2002, 28 Neoplan articulated trolleybuses were added to the fleet, replacing 29 rigid 12-metre-long (40 ft) vehicles built between 1964 and 1969.

2, dating back to the opening of the Lausanne system in 1932, has also been preserved and is now the oldest trolleybus in continental Europe.

As of 2012[update], the TL trolleybus fleet consisted of 58 rigid (two-axle) and 35 articulated vehicles.