The Forth Bridge is a cantilever railway bridge over the Firth of Forth in the east of Scotland, to the east of the Forth Road Bridge, and 14 kilometres (9 mi) west of central Edinburgh. It is often called the Forth Rail Bridge or Forth Railway Bridge to distinguish it from the Forth Road Bridge. It was opened on 4 March 1890. The bridge connects Scotland's capital city, Edinburgh, with Fife, leaving the Lothians at Dalmeny and arriving in Fife at North Queensferry; it acts as a major artery connecting the north-east and south-east of the country. Described in the Collins Encyclopaedia of Scotland as "the one immediately and internationally recognised Scottish landmark", it may be nominated by the British government to be added to the UNESCO World Heritage Sites in Scotland. The bridge and its associated railway infrastructure is owned by Network Rail Infrastructure Limited. Until 1917, when the Quebec Bridge was completed, it was
designs by company engineers Francis O'Rourke and Pomeroy P Dickinson, the overall length is 6768ft (2063m), including two cantilevers of 548ft (167m) each. Strengthened in 1906 by adding a third line of trusses down the middle designed by Ralph Modjeski, citizens on both sides of the river are working to have this magnificent, but now abandoned, bridge incorporated as part of the Hudson Greenway trail system. Figure 20 Forth Bridge (1890): an historic photograph showing the FifeTower at North Queensferry, Scotland (UK), nearing completion. The illustration is from Wilhelm Wethofen's article published in Engineering Magazine, 28 February 1890. The world's most famous cantilever also is one of the world's first and largest steel bridges and held the record for longest cantilever for 27 years. Pontists are familiar with the brilliant demonstration used by Sir Benjamin Baker to illustrate the structural principles of the Firth of Forth Bridge: two
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