Q. Which is the longest highway in Bihar?
Answer: Old NH 57
Notes: Old NH 57 is the longest highway in Bihar. It is now a part of NH 27. Former NH 57 linked Muzaffarpur to Purnea and It was 310 Km long. It became a part of NH 27 in 2010.
Question Source: 📚This question is part of the Bihar General Studies [1500+MCQs] course available only in the GKToday Android App. Download the app here.
📌 Question Number: 114 in Economy, Schemes, Budget and Economic Survey in the above course in App.