The Armour-Swift-Burlington (ASB) Bridge, also known as the North Kansas City Bridge, is a rail crossing over the Missouri River in Kansas City, Missouri that formerly also handled car traffic.
The piers were built in 1890. However, later that year, lack of funding prevented the bridge from being built. In 1909, John Alexander Low Waddell designed the current bridge and construction started. The bridge is one of two of this type that had car traffic on Route 9 on the upper level, and rail traffic on the lower level. The lower deck could be raised to permit riverboats to pass without interrupting car traffic on top. This design allowed the hangers from the lower deck to go through the truss members of the upper deck.