The Muzaffarpur-Sitamarhi-Sonbarsa section of NH-22 is being expanded to four lanes. This project is being developed under the central government's 'Bharatmala Pariyojana', which aims to strengthen the highway network across the country. This expansion will significantly reduce travel time between Muzaffarpur and Sitamarhi, boosting local trade and tourism. The widening of the road is expected to ease traffic congestion and reduce accidents. This section is a crucial connectivity artery for the northern part of Bihar, providing access up to the Nepal border.