| Seyhan Viaduct | |
| Native Name: | Seyhan Viyadüğü |
| Native Name Lang: | tr |
| Coordinates: | 37.0127°N 35.1927°W |
| Carries: | 6 lanes of [1] |
| Crosses: | Seyhan River |
| Locale: | Seyhan and Yüreğir, Adana |
| Named For: | Seyhan river |
| Owner: | Karayolları Genel Müdürlüğü |
| Design: | Box-girder bridge |
| Length: | 470m (1,540feet) |
| Complete: | 1992[2] |
| Traffic: | 34,241 (2014)[3] |
The Seyhan Viaduct (Turkish: Seyhan Viyadüğü) is a 470adj=midNaNadj=mid box-girder bridge that carries the O-51 motorway across the Seyhan River in Adana, Turkey. The bridge is the northernmost crossing of the river before the Seyhan Dam, just upstream.
The Pozant-Adana-Skenderun highway initially included the 1992-completed Seyhan Viaduct. Once completed, the route was re-designated as the Adana Beltway (O-50) and has recently been re-designated again, after the O-50 was replaced by the O-51 and O-52.
