Delhi is all set to be a world-class city. At least that is what the Transport Department would like us to believe. After High Capacity Buses now it is the turn of Electric Trolley Buses to run on Delhi roads. Electric trolley buses are passenger buses with an electric motor that draws power from overhead wires. "They are a parallel system to High Capacity Buses which will soon be seen on Delhi roads. So far, two corridors have been identified which are Hari Nagar to Central Secretariat and Badarpur to Pragati Maidan", said a senior official of the Transport Department.