E4-bron, Södertälje, Road bridge in Södertälje, Sweden

E4-bron is a lift bridge carrying the E4/E20 motorway over the Baltic Sea section of the Södertälje Canal. Its total length is about 500 metres and its width 27.3 metres. The movable part is a 63-metre steel truss in two parallel sections, giving 26.2 metres clearance when closed and 42 metres when raised.

The bridge was inaugurated in 1965 when the E4/E20 motorway through Södertälje was built; until then traffic passed through the town centre over Mälarbron. It is a lift bridge, not a suspension bridge, with a 63-metre truss span. In May 1990 the northbound lift span fell during a lift, and a temporary British BB2 beam bridge kept the motorway open for ten months.

Locals simply call it Motorvägsbron, the motorway bridge. It carries the E4/E20 between the Saltskog Östra and Moraberg interchanges, and each opening for shipping lasts about 20 minutes, announced in advance on radio traffic news, often leaving long queues on the motorway.

The bridge is remotely controlled from Lotsudden and offers a standard height clearance of about 26 meters for water traffic. When raised, this clearance extends to about 42 meters to accommodate larger vessels.

In 1990 the northern lift span suffered structural damage during operation, requiring installation of a temporary British bridge for emergency use. This provisional solution remained in place for about ten months until repairs were completed.