Koilwar Bridge, (officially Abdul Bari Bridge) at Koilwar in Bhojpur spans the Sone river. This 1.44 km long, 2-lane wide rail-cum-road bridge connects Arrah with Patna, the capital of Bihar state in India. The bridge is named after Indian academic and social reformer Prof. Abdul Bari, and is presently the oldest operational railway bridge in India standing since 04 November 1862. It is shown in the 1982 Oscar award winning film Gandhi, directed by Richard Attenborough. From 1862 to 1900, Koilwar bridge remained as the longest river bridge in India.