Tranebergsbron, Double arch bridge in Stockholm, Sweden

Tranebergsbron is a double concrete arch bridge inaugurated in 1934, 450 metres long and 27 metres wide, with a main span of 181 metres. It carries Drottningholmsvägen and the green metro line between Kungsholmen and Traneberg. A third, steel arch clad in concrete was added south of the original arches in 2002.

A floating bridge originally stood at this location and was completed in 1787. The current structure was built in the 1930s, replacing the earlier structure with modern engineering techniques.

The bridge's name comes from Traneberg, the area on the western shore, and it carries Drottningholmsvägen (County Road 275). Since 1952 the northern arch has carried the green metro line to Hässelby, while the middle arch handles westbound traffic and the southern arch walkers, cyclists and eastbound traffic.

Pedestrians and cyclists use the southern arch, opened in 2002, while westbound traffic uses the middle arch and the metro runs on the northern arch. A red granite memorial at the western abutment marks the 1932–1934 construction and the 1999–2005 rebuilding. The navigable clearance under the bridge is 25.2 metres.

The bridge was designed with enough vertical clearance to allow large ships to pass underneath, maintaining about 26 meters of space beneath the arches. This detail shows how the engineers balanced the needs of maritime traffic with urban connectivity.