The Kipparlahti Metro rail bridge will be rebuilt in the summer of 2021. The bridge project will allow for increases in the axle weight of Metro trains and the Metro capacity. The Kipparlahti bridge is located about half a kilometre to the west from the Herttoniemi Metro Station. The bridge crosses over the street of Kipparlahden silmukka.
The present load capacity of the Kipparlahti Metro rail bridge, completed in 1972, does not allow Metro axle weights to be increased and the Metro system to be developed further. Due to the bridge construction, the bridge cannot be reinforced but has to be rebuilt.
“In addition to allowing the Metro system to be developed, the construction of a new bridge enables compliance with an overpass for the Itäbaana express cycling way projected to be built next to the Metro rail bridge,” says project manager Eero Valkama of Helsinki City Transport HKL, the Metro system operator.
Because of the rebuilding of the Kipparlahti Metro rail bridge, there will be no Metro service between Itäkeskus and Sörnäinen for about two weeks in the summer of 2021. Helsinki Region Transport HSL, the metropolitan public transit authority, will organize replacing service for the duration of the break in regular Metro service.
The rebuilding of the Kipparlahti bridge is one of many components in the Metro rail system development that allow axle weight and capacity increases.
The Kulosaari Metro rail bridge, another Metro rail bridge in the eastern part of the Metro rail system, was reinforced in connection with the bridge renovation in 2017 to allow the bridge to carry larger loads. According to plan, the Siilitie and Sahaajankatu Metro rail bridges in the same area will also be reinforced. All Metro rail bridges will be reinforced by the end of the 2020s, at the time of HKL’s planned new Metro fleet acquisitions.