National Highway 81 is a 100 km-long road that connects Kora in
Bihar with
Malda in
West Bengal. National Highway 81 starts at Kora and runs south-east through
Katihar and through Harishchandrapur, Samsi and
Pandua in West Bengal, before ending at Malda. The highway is 45 km long in Bihar while the remaining distance is in West Bengal.