A viaduct which crosses the River Clyde in Glasgow, the City Union Railway Bridge lies between the Victoria Bridge and the Albert Bridge, to the west of Glasgow Green. Designed by engineer William Melville, it was built by Morrison & Mason and Sir William Arrol & Co in 1899 to carry four tracks servicing the former St Enoch's Station. Supported on granite piers, five steelwork arches cross the river, with lattice-girders forming the approach spans at either end. Decorative iron-work compliments its crenellated red-sandstone towers. Pairs of double-height castellated towers lie at the ends of the bridge. Although now reduced to only two railway tracks, the bridge is still in use making a connection in the suburban rail network between the southwest of the city and the east-end.
It is sometimes known as the Clydebridge Viaduct, although this name causes confusion with another Clydebridge Viaduct, upstream at Carmyle.