Traismauer Danube motorway bridge, Road bridge in Lower Austria, Austria.

The Traismauer Danube motorway bridge is a road bridge that crosses the river, linking the Stockerau expressway S5 with the S33 route toward St. Pölten. The structure features a main span and integrated pathways for cyclists and pedestrians.

The bridge was officially opened on 30 October 2010 by Erwin Pröll, Asfinag board member Alois Schedl and transport ministry secretary-general Herbert Kasser; traffic was released the following day, and the cycle path and green areas were finished by mid-2011. It carries the S33 extension across the Danube at kilometre 1991.35, creating a motorway-standard axis from the Weinviertel to St. Pölten and removing the detour via Krems. With its opening, through-traffic bans for lorries over 3.5 tonnes came into force on the B1, B19 and B43.

The bridge is also called St. Georgsbrücke, after the monastery of St. Georgen founded at this spot; it moved to Herzogenburg 130 years later. The name keeps that earlier foundation in view at a crossing where no monastery building remains.

The cycle path and green areas along the bridge were completed by mid-2011. Since the bridge opened, trucks over 3.5 tonnes have been banned from through traffic on the Wiener Straße (B1), Tullner Straße (B19) and Traismaurer Straße (B43). The bridge crosses the Danube at river kilometre 1991.35, in the backwater of the Altenwörth power plant.

The main span stretches 356 meters and was built using prefabricated piers constructed at full height before being placed in the river. This construction method allowed for efficient and precise installation of the large structural pieces.