Trolleybuses in Plovdiv Trolleybuses in Plovdiv The Plovdiv trolleybus system () was a part of the public transport network of the city and municipality of Plovdiv, the second most populous city in Bulgaria. Opened in December 1955, the system had waxed and waned in size over time. As of the beginning of 2012, it was made up of only one route. There are current disputes between the operator and the municipality regarding the validity of the trolleybus contract. Gradski Transport Plovdiv is still the operator of this type of transport, despite the numerous infractions of the contract since 2010. In October 2012, because
Plovdiv the Slavic name began to appear as "Papaldiv/n Plo(v)div, Pladiv, Pladin, Plapdiv, Plovdin", which evolved from a Thracian variant "Pulpudeva". As a result, the name has lost any meaning. In British English the Bulgarian variant "Plòvdiv" has become prevalent after World War I. The Crusaders mentioned the city as "Prineople", "Sinople" and "Phinepople". The Ottomans called the city "Filibe", a corruption of "Philip", in a document from 1448. Plovdiv is located on the banks of the Maritsa river, southeast of the Bulgarian capital Sofia. The city is in the southern part of the "Plain of Plovdiv", an alluvial plain that