Rama VI Bridge (Thai: สะพานพระราม 6, RTGS: Saphan Phra Ram Hok, pronounced [sā.pʰāːn pʰráʔ rāːm hòk]) is a railway bridge over the Chao Phraya River in Bangkok, in Thailand, connecting the districts Bang Sue and Bang Phlat. It is the first bridge to cross the Chao Phraya River and was initially both a single-track railway and road (two lanes) bridge. Construction started in December 1922, during the reign of Vajiravudh to link the Northern Line with the Southern Line. Construction cost was 2,714,113.30 baht and It was officially opened on 1 January 1927.