Bridge four-lane highway on the upper level and a pair of railway tracks at the lower level. Tower Bridge in London is different example of a double-decked bridge, with the central section consisting of a low level bascule span and a high level footbridge. A viaduct is made up of multiple bridges connected into one longer structure. The longest and some of the highest bridges are viaducts, such as the Lake Pontchartrain Causeway and Millau Viaduct. A three-way bridge has three separate spans which meet near the center of the bridge. The bridge appears as a "T" or "Y" when viewed
Blackfriars Bridge Blackfriars Bridge Blackfriars Bridge is a road and foot traffic bridge over the River Thames in London, between Waterloo Bridge and Blackfriars Railway Bridge, carrying the A201 road. The north end is near the Inns of Court and Temple Church, along with Blackfriars station. The south end is near the Tate Modern art gallery and the Oxo Tower. The first fixed crossing at Blackfriars was a long toll bridge designed in an Italianate style by Robert Mylne and constructed with nine semi-elliptical arches of Portland stone. Beating designs by John Gwynn and George Dance, it took nine years to build,