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
London Bridge (Fergie song) a bit more edge, be very distinct, be very mixed." Fergie is seen intermittently sailing down the River Thames just in front of Tower Bridge, which is not the same as London Bridge, despite the song title. Fergie based one of her outfits for the video on her family's crest and tartan, with some changes as she wanted it to be modernized. She also wears a tiara cocked to the side of her head to play off the royal name of her album, as well as having the same surname (Ferguson) and nickname, as the Duchess of York (Sarah Ferguson).