The Salah Bey Viaduct (Arabic: جسر صالح باي), is a cable-stayed bridge that spans the gorge valley of the Rhumel River in Constantine, North East Algeria is named after Salah Bey whose rule of the city (1771-1792) was marked by major urban works, This viaduct is already considered the "eighth wonder" of the city with seven bridges.

With a length of 1119m, the viaduct has a futuristic design, which modernized the urban configuration of the city.

The Salah Bey Viaduct is the eighth bridge in Constantine, the longest with 756 meters for the main viaduct and 4.3 kilometers, counting the connections and accesses.

The viaduct is connected to the East–West Highway from three sides, from the south via the N5, from the east via the N3, and from the north via the Djebel El Ouahch area, where road widening works were undertaken and a tunnel was built to facilitate access.

The Salah Bey Viaduct was inaugurated on July 26, 2014, by Prime Minister Abdelmalek Sellal,[2] named after the governor of Constantine Salah Bey from 1771 to 1792.