Irisbus Citelis is a wheelchair-accessible city bus produced by Irisbus. It was introduced in 2005 to replace the Agora. It comes in two varieties: Citelis 12, which is of standard m (ft) length, and Citelis 18, which is articulated and has a length of m (ft). Citelis models use Euro 4, Euro 5 & EEV engines. The buses can also be built as trolleybuses, utilising overhead electrical wires for their power supply instead of fuel.Trolleybus version of Citelis is also known as Skoda 24Tr, especially in Eastern Europe.