Kalyanpur–Gaighat Road (Udayapur 1 Constituency Road ) is a national priority road in Nepal located between Koshi Province and Madhesh Province. The road connects Khadak Municipality in Saptari District to Triyuga Municipality in Udayapur District. The total length of the highway is and the maximum elevation of the road is .
The road starts at Kalyanpur of Khadak Municipality extracting from Mahendra Highway (NH01) and passes through Shivalik hills and jungles to enter the Inner Terai Valley of Udayapur. The road then intersects with Sagarmatha Highway (NH16) at Motigada of Triyuga Municipality. The road passes through the area between Kalyanpur and Motigada: Chakuwa, Dhanha and Rikkiyathoma. This road is categorised as an Electoral Constituency Strategic Road
References
See also Election Constituency Strategic Road List of roads in Nepal