power pole and pantograph of a trolleybus connecting vehicle to electrical cable line, the overhead cable, or catenary

background belgrade beograd bus cable cabling catenary city commute connection decay depot draws dual ecology electric electrical electricity energy generally green industrial industry infrastructure line mobility neglect neglected overhead pantograph perch picture pole poles posts power public roadside serbia springloaded srbija street suspended system technology that transit transport transportation trola trolej trolley trolleybus two urban using voltage wire wires workshop worskhop