Wikipedia:WikiProject U.S. Roads/Pennsylvania/Selected article/August 2011

Pennsylvania Route 405 (designated by the Pennsylvania Department of Transportation as SR 0405) is a state highway that runs for 28.05 mi 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.

Route 405 originated as the Muncy and Hughesville Plank Road, a 5 mi plank road from Muncy to Hughesville, created in 1853. The plank road also consisted of a bridge over the Muncy Canal on the outskirts of the community. Route 405 was assigned in 1941, after switching between numerous designations, including alignments of U.S. Route 15, U.S. Route 111, U.S. Route 220, and U.S. Route 711. The alignment of Route 405 was extended to its current southern terminus when Route 147 was realigned onto a new highway. As part of the Central Susquehanna Valley Transportation Project, PA 405 will continue south from its current southern terminus, replacing the stretch of PA 147 until its junction with PA 61 in Sunbury, its new southern terminus. PA 147 will have an alternate route between those two junctions and will not be duplexed with PA 405 at any point.