The Road Transport Ministry outlined the Muzaffarpur–Sitamarhi–Sonbarsa highway upgrade in a 13 October release. It said the 82.57-km four-laning project had received Cabinet approval in August at a capital cost of ₹3,590.73 crore.
The corridor links Muzaffarpur with the Nepal border. The ministry expects better passenger and freight movement and stronger regional links. The source describes an approved development project, not a completed four-lane road.
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Source: Press Information Bureau. Original release: 13 OCT 2026. https://www.pib.gov.in/PressReleasePage.aspx?PRID=2322801