The Koilwar Bridge, now named Abdul Bari Bridge, at Koilwar spans the River Sone. The bridge was named after Professor Abdul Bari, academic and social reformer. The steel lattice-girder Koilwar Bridge (known as Sone Bridge when it was built) was the longest bridge in the subcontinent when built: construction started in 1856, disrupted by uprisings in 1857, and completed in 1862. A two-lane road (NH 30) runs under the twin rail tracks. The bridge is shown in the film Gandhi.