Alviksbron, Bicycle bridge in Stockholm, Sweden.

Alviksbron is a bicycle bridge in Stockholm that spans across Oxhålssundet and connects Stora Essingen island with the Bromma district. The structure features separate cycling lanes and pedestrian paths, along with illuminated support pillars that ensure safe passage throughout the day and night.

This bridge was constructed between 1996 and 1998 as part of Stockholm's cycling infrastructure expansion. After completion, structural issues emerged that required reinforcement work to ensure long-term stability.

The name comes from Alvik, a manor house built in 1819 and demolished in 1930. The bridge carries the Tvärbanan light rail on double track alongside a pedestrian and cycle path, so trams and cyclists cross Oxhålssundet side by side.

The cycling lanes and pedestrian paths are clearly separated, making it safe for all users to navigate. The lighting along the bridge works well in darker conditions, making it a reliable route regardless of the time of day.

The cracks found in 2001 were shear fissures in the box-girder ribs, 0.1–0.3 mm wide at angles of 25–30°, and more numerous on the south side. Investigators linked them to compressive stress from longitudinal tensioning combined with solar heat. Repairs used carbon fibre laminates on minor fissures and tie struts in the worst sections, all inside the girder, so nothing shows on the outside.