The Cabinet Committee on Economic Affairs, led by Prime Minister Narendra Modi, has sanctioned the upgradation of the Khagaria-Purnea section of National Highways 31 and 231 in Bihar, with an investment of ₹3,936 crore. This initiative will transform 143.529 kilometers of roadway into a four-lane highway, addressing critical geometric deficiencies and congestion in Khagaria, Bhagalpur, Katihar, and Purnia districts. A significant feature of the project includes a 6.729-kilometer Greenfield Bypass around Purnea City. The upgraded highway is projected to enhance average travel speeds, cutting travel time to about two hours, while also improving road safety and fuel efficiency. Furthermore, the corridor will facilitate better connectivity to key economic and logistics hubs, integrating with five PM Gati-Shakti Economic Nodes and eleven Logistic Nodes, which include major railway stations and an airport. This upgrade is expected to significantly boost regional mobility and socio-economic growth in Bihar.