Geneva's first trolleybus line, inaugurated on 11 September 1942, linked
Champel with
Le Petit-Saconnex, replacing the former tram line. Like the tramway network, it was operated by the
Compagnie Genevoise des Tramways Électriques (CGTE). In subsequent years, other tram lines were closed and replaced with trolleybus lines: • in 1950, line 4; • in 1959, line 6; • in 1961, line 2. Additionally, two trolleybus lines replaced former bus lines: • in 1950, line 7 to
Aïre; • in 1959, line 33 to
Cointrin. In 1971, line 4 was closed. In 1976, the name of the operator, CGTE, was changed to
Transports Publics Genevois (TPG). On 25 September 1989, line 5 was merged into line 6. For more than a decade, some services on the extended line 6 were operated by conventional buses (fully trolleybus line 26 was supporting it till Châtelaine), but on 24 June 2001 the line reverted to operation solely by trolleybuses. == Lines ==