The Sion Panvel Expressway is a 25 km Indian highway connecting the Sion to Panvel via Navi Mumbai in the state of Maharashtra. It is one of the busiest and most important roads in the Mumbai Metropolitan Area and connects Mumbai with the city of Pune. National Highway 4 and Mumbai Pune Expressway meet the eastern end of Sion Panvel Highway at Kalamboli junction near Panvel. The highway is also used by vehicles traveling towards Mumbai from Konkan and Goa.