in october 2003, atc awarded a contract for the construction and equipped for a network of new trolleybus routes that would use optical guidance, and the contract's fleet component was an order for 49 civis-model articulated trolleybuses (a variant of the cristalis model), to be built by irisbus. a prototype was delivered in may 2005, and eventually all 49 vehicles were delivered, but none was ever placed in service. during testing of the first vehicles, atc identified what it considered to be technical deficiencies with the civis trolleybuses. it ultimately concluded the vehicles were unsatisfactory. after a period of negotiation, atc reached an agreement in autumn 2012 with the manufacturer, which by then had been renamed iveco bus (following a demerging of iveco from fiat in january 2011). under the agreement, iveco bus would replace the entire series of 49 civis trolleybuses with 55 trolleybuses of a newer model, the crealis; the quantity was later reduced to 49. the first three were delivered in spring 2015.