Pont de Zaehringen, Road bridge in Fribourg, Switzerland

The Pont de Zaehringen is a 246-metre concrete viaduct over the Sarine, linking the Schoenberg district with the Bourg quarter of Fribourg. It has seven semicircular arches with clear spans of 30 metres, and its deck, with walkways and cycle strips on both sides, is 11.5 metres wide. A separate 3.5-metre bridge with three segmental arches stands lower down at the river.

The structure was built in 1924, replacing an earlier suspension bridge that had occupied the same location since 1834. This new construction marked a shift toward modern engineering methods of the early 20th century.

The bridge takes its name from the Zähringen family, who founded Fribourg in 1157. Its French name, Grand Pont, was used for the 1834 suspension bridge it replaced. Since 12 October 2014, motor vehicles have been barred except for security services, mopeds and public transport, so the deck now carries mainly pedestrians and cyclists between Schoenberg and Bourg.

Since 12 October 2014, motor vehicles are barred from the upper deck, except public transport, mopeds and emergency services; the Poya bridge upstream now carries through traffic. Pedestrians and cyclists cross on the 11.5 m wide deck with sidewalks and cycle strips. A narrow road passage runs through the piers a few metres above the water, linking the Auge quarter.

The 1834 suspension bridge was tested before opening by loading it with twelve cannons, 50 horses and 300 people. Its designer, Joseph Chaley, won the contract with the cheapest bid, 200,000 francs, and his 273-metre span was the world's longest until 1849.