According to press tv, the bridge has been restored several times, the columns being reinforced with concrete under the first Pahlavi.

According to the provincial Cultural Heritage Office of Khuzestan, vehicles will not be allowed to cross the bridge after its restoration is complete.

Dezfoul Bridge was built during the reign of the Sassanid king, Shapour I, with the help of the Roman Emperor Valerian's army he captured in 260 CE.

Evidence shows the present bridge was constructed over the ruins of an older structure, presumably built during the Elamite era.

Source : english.farsnews.com