Crossing the Kansas River in Kansas City, Kansas, United States, the Highline Bridge is rare example of a double-tracked, double-deck railroad bridge designed for carrying railroad traffic on both levels. The bridge is owned and operated by the Kansas City Terminal Railway (KCTR) and provides access between the extensive rail yards on both sides of the river in the Argentine and Armourdale neighborhoods in Kansas City, Kansas, and other rail yards in Kansas City, Missouri.

The current bridge was constructed between 1916 and 1919 as part of the improvements needed to relocate the Kansas City Union Station to its present location while still providing efficient access to railroads serving the station from the west and northwest. The upper deck is a critical link in the elevated Kansas City Highline viaduct originally constructed to carry passenger trains over several busy freight junctions west of the Union Station. The railroads using the bridge for passenger service at the time of construction included the Union Pacific; Chicago Great Western; Missouri Pacific; and Rock Island. Mainlines and junctions then crossed by the Highline included Atchison, Topeka and Santa Fe; Kansas City Terminal; Chicago, Burlington and Quincy; The Katy; Kansas City Southern; and Frisco.

Currently, the bridge handles freight traffic on both levels.

Construction of the bridge and several miles of associated viaducts largely on the northwest side of river cost $3M and was part of $4.5M (approximately $100M adjusted for inflation to 2022) in total improvements needed for the terminal relocation project. The construction of the Highline Bridge was delayed several years beyond the 1914 opening of the new union station due to disagreement on route of the viaducts and location of stations serving Kansas City, Kansas.

The current bridge replaced a 730-foot single-track bridge built in 1907 that consisted of two 300-foot Petit truss spans and a 130-foot approach on the west side. The piers of the old bridge had been constructed to accommodate double track and were reused. Since the old bridge carried approximately 180 train movements per day across the river it could not be removed from operation to accommodate construction. Due to the new bridge's greater height and width, it was constructed around the old bridge while it remained in service, although the existing tracks were centered and elevated so the new bridge floor could be constructed under it.

The current bridge consists of two reinforced Baltimore truss sections built on the original masonry (each weigh 2,300 tons), extended to accommodate the double-deck height, while the west approach was rebuilt as a 132-foot Warren truss such that the bridge is a through structure for the lower deck and a deck structure for the top deck.

All three truss sections that cross the river between the levees have lift jacks to raise the bridge above a high flood.

Construction work was under the direction of J. V. Hanna, chief engineer, and G. E. Tebbetts, bridge engineer of the Kansas City Terminal. The general contractor for the entire project was the Arkansas Bridge Company of Kansas City, MO. The steel work was fabricated by the American Bridge Company at the Gary, IN plant, and was erected by the Kelly Atkinson Construction Company, Chicago, IL.