Bogen railway bridge, Steel railway bridge in Aiterhofen, Germany.

The Bogen railway bridge carries the single-track Straubing–Bogen line over the Danube and its old arm at kilometre 2311.27. The river span is a parallel-chord steel truss with three fields: a 60-metre central field flanked by two of 45.8 metres, the track running between the girders. Together with the flood bridges it comprises 20 spans over 547 metres; approach ramps on both banks give shipping clearance.

The bridge opened in 1895 as part of the Straubing-Miltach railway line and marked the expansion of rail infrastructure in Lower Bavaria. It made the construction of this line possible through a river crossing that had previously been a major technical challenge.

The bridge represents a significant example of 19th-century German engineering, demonstrating the industrial capabilities of Bavaria during its railway development period.

Access to the bridge structure is limited since it is an active railway line with strict safety regulations. From the riverbanks you can view the structure from a distance and appreciate its architecture.

The bridge's clearance is only 5.0 metres above the high-water mark, so it is fitted with lighting and radar reflectors to warn ships. Collisions recur at high water; on 22 January 2018 a Romanian freighter struck it with its wheelhouse because the captain had not lowered it after unloading at Straubing-Sand harbour. Only a radar reflector was damaged and the bridge stayed open.