The Katraj–Dehu Road Bypass (also known as Westerly Bypass or simply Pune Bypass) is a metropolitan highway serving the city of Pune, India. It passes through outer parts of Pune City. The highway stretches 40 km from Dehu Road in the north to Katraj in the south. It is generally 6 lanes wide (3 in each direction) and certain sections feature separate service lanes. Further, it features around a dozen overpasses/flyovers. It is a part of the National Highway 4 and was widened in early 2000s by the National Highways Authority of India from a 2-lane to a 4-lane highway.