<P> The Niagara Falls Suspension Bridge , which stood from 1855 to 1897 across the Niagara River , was the world 's first working railway suspension bridge . It spanned 825 feet ( 251 m ) and stood 2.5 miles ( 4.0 km ) downstream of Niagara Falls , where it connected Niagara Falls , Ontario , to Niagara Falls , New York . Trains used the upper of its two decks , pedestrians and carriages the lower . The brainchild of Canadian politicians , the bridge was built by one American and one Canadian company . It was most commonly called the Suspension Bridge ; other names included Niagara Railway Suspension Bridge , Niagara Suspension Bridge , and its official American name , the International Suspension Bridge . </P>
what kind of bridge is the niagara falls bridge
the world 's first working railway suspension bridge