Gdanski Bridge in Warsaw, Poland. Gdansk Bridge is a six-span steel truss bridge 406.5 m long and 17 m wide, across the Vistula in Warsaw, Poland. It was opened on 31 July 1959, after three years' construction. It has two elevations. The upper part serves road transport with four road lanes and sidewalk. The lower part serves tramway transport with two tracks, and also features sidewalk and cycling lane.