High Quality Content by WIKIPEDIA articles! National Highway 80 (NH 80) is a National Highway in Eastern India that links Mokamah, Bihar to Farrakka in West Bengal. This 310 kilometres (190 mi)-long highway passes through three states – Bihar 200 km (120 mi), Jharkhand 100 km (62 mi) and West Bengal 10 km (6.2 mi) of India. NH 80 passes through Lakhisarai - Munger - Bhagalpur - Kahalgaon - Rajmahal. It meets NH 34 at Farrakka.