Mahatma Gandhi Setu (Hindi: महात्मा गांधी सेतु) (also called Gandhi Setu or Ganga Setu) is a bridge over the river Ganges connecting Patna in the south to Hajipur in the north of Bihar. It was the longest river bridge in India at the time of its construction and remains the longest river bridge in Asia. It was inaugurated in May 1982 by the then Prime Minister, Mrs Indira Gandhi.
This bridge consists 45 intermediate spans of 121.065 metres (397.19 ft) each and a span of 65.530 metres (214.99 ft) at each end. The deck provides for a 7.5 metres (25 ft) wide two lane roadway for IRC class 70 R loading with footpaths on either side. The cantilever segmental construction method was adopted to construct this mega bridge.
In recent times, the Bridge has been witnessing major traffic chaos and accidents due to exceeding number of vehicles passing over it and its regularly damaging structure. Bihar Government is planing to build two Pontoon bridges in parallel to it, in order to ease traffic.