High Quality Content by WIKIPEDIA articles! Pennsylvania Route 405 (designated by the Pennsylvania Department of Transportation as SR 0405) is a state highway that runs for 28.05 miles (45.14 km) in north central Pennsylvania, United States. The southern terminus of Pennsylvania Route 147 in West Chillisquaque Township. The route heads northward along the West Branch Susquehanna River through Milton, Watsontown and Muncy until entering Hughesville, where it terminates at an intersection with U.S. Route 220.