Klarabergsviadukten

Klarabergsviadukten (Swedish: "The Viaduct of Hill of St Clare"[1]) is a reinforced concrete bridge and an overpass in central Stockholm, Sweden.

Stretching over Klara Sjö, it connects Norrmalm to Kungsholmen.

The (not particularly small) spans of Klarabergsviadukten stretches over both a railway yard and Klara sjö ("Lake Klara"), and was originally intended to form part of a traffic route, Klarabergsleden, connecting central Stockholm to the western suburbs, plans cancelled in 1974.

First brought up in a proposal in 1928, a traffic route bridging the central railway yard in Stockholm and Klara sjö was planned to continue through the Seraphim Hospital area over Norr Mälarstrand along the southern shore of Kungsholmen to reach Drottningsholmsvägen, the road leaving Stockholm for the western suburbs.

Over the years, the expected development of the traffic system in Stockholm made the planned route wider and wider, from the planned 18 metres in 1932 to 31 metres when the viaduct and bridge were finally built in 1961.