Rheinbrücke N4, Cable-stayed road bridge in Schaffhausen, Switzerland.

The Rheinbrücke N4 is a 151.76-metre cable-stayed bridge carrying the A4 motorway across the Rhine between Schaffhausen and Flurlingen. Its deck curves through the river bend with a radius of 280 to 400 metres, and a single 51.9-metre pylon, inclined about 70 degrees toward the river, stands on the southern bank. The main span over the water measures 125.26 metres, with a 26.5-metre span over the Gründenstrasse.

Construction began in 1993 and finished in 1995, following planning that started in the 1960s. The project was created to meet growing transportation needs between the regions.

The bridge carries the A4 motorway and European route E41 between Schaffhausen and Flurlingen, crossing the Rhine just downstream of the river bend. Its inclined pylon on the southern bank was chosen over a vertical river pylon so that the view over the bend stays open. The name simply refers to the N4 national road it serves.

The bridge is open daily for through traffic and connects the cantons of Schaffhausen and Zurich. Drivers should expect regular traffic volume, especially during peak hours.

The pylon leans about 70 degrees toward the Rhine and rises 51.9 metres above the deck, which itself sits 10.5 metres above the river's mean water level. The bridge deck curves through the river bend with a radius between 280 and 400 metres.