National Highway 531 (NH531), total length: 93 km (58 mi)
States: Bihar
Route：Gopalganj－Siwan.
National Highway 531 (NH531) MapNational Highway 531 (NH531) Traffic Weather Conditions along National Highway 531 (NH531) Cities along National Highway 531 (NH531) Petrol Stations along National Highway 531 (NH531) Restaurants along National Highway 531 (NH531) Hotels along National Highway 531 (NH531) more service along National Highway 531 (NH531)