The Geneva bus network is a network of buses forming the core element of the public transport system in Geneva, Switzerland. It is operated by Transports Publics Genevois (TPG), and is supplemented by the Geneva trolleybus system and the Geneva trams. There are lines running throughout the canton except for Céligny. There are a few lines that run in the Ain and Haute-Savoie departments in France. Some lines aren't operated by TPG but rather by Lihsa (271,272,274).