Talbrücke Heidingsfeld, Road bridge in Würzburg, Germany

The Talbrücke Heidingsfeld is a 635 m long motorway bridge carrying the A3 south of Würzburg between the Nonnenberg and Katzenberg hills, up to 50 m above the valley floor with the Stuttgart railway line and Stuttgarter Straße below. Its two curved decks are single-cell steel box girders with a composite reinforced-concrete roadway slab, 22.28 m and 20.28 m wide, on seven spans of 53 to 120 m. Transparent noise barriers 6 m high line both sides.

The first bridge was built between 1961 and 1963 with a single deck carrying two lanes toward Nuremberg and three toward Frankfurt. During deck construction in 1963 a support settled, dropping the deck 0.8 m and shifting it 0.13 m lengthwise, without injuries. The old structure was demolished in 2018; the replacement, awarded in April 2014 for about 71 million euros, opened its northern deck on 1 March 2018 and was finished at the end of 2020.

The bridge carries the A3 over the railway line from Würzburg to Stuttgart and the Stuttgarter Straße, in the Heidingsfeld district south of Würzburg. Its name comes from that district. The 1963 structure was demolished in 2018; the replacement stands north of it and about 10 m lower.

The bridge carries the six-lane Bundesautobahn 3 over the valley; it is a motorway structure with no pedestrian or cycle path. The new deck, built north of the 1963 bridge and about 10 m lower, has 6 m high transparent noise barriers on both sides. The old structure was demolished in 2018.

The 2014 contract for demolition and rebuilding was awarded at about 71 million euros including VAT, against an original estimate of 66 million. The design came from a competition that produced no winner; a combination of the two second places was built, with widening column spacing and slender piers.