Fredriksdalsbron, Railway viaduct in Johanneshov, Sweden

Fredriksdalsbron is a railway viaduct in southern Stockholm that carries tram traffic across the urban landscape on a long concrete structure. The bridge spans over multiple levels and connects western districts to the Hammarby sjöstad waterfront area.

The viaduct opened in 2002 as part of Stockholm's modernization of its public transport network in the early 21st century. It extended tram service to southeastern districts and newly developed residential areas.

The bridge is often wrongly called "Mårtensdalsbron"; its working name was Kvarnbron, after the nearby Skanskvarn mill. The lower approach, about 130 metres long, is known as Mårtensdalsrampen but has no official name. Since it opened, several road vehicles have accidentally driven up the ramp, and on 2 December 2012 a car got almost all the way to Gullmarsplan, 560 metres from the ramp's start, before stopping at the points.

The lower approach, about 130 metres long, is called Mårtensdalsrampen but has no official name. Cars have repeatedly driven up the ramp by mistake, and on 2 December 2012 one reached the points before Gullmarsplan, 560 metres from the ramp's start, and had to be towed by a track-going tractor.

The lower approach, about 130 metres long, is called Mårtensdalsrampen but has no official name. Since the bridge opened, several road vehicles have accidentally driven up the ramp; on 2 December 2012 a car covered 560 metres, the whole ramp and bridge, before stopping at the points near Gullmarsplan and being towed by a track-going tractor.