 PA 490 was designated in 1928 to run from U.S. Route 611 (US 611) in Tobyhanna northeast to PA 90 (now PA 191) in Laanna.In the 1930s, the route was extended and realigned to run from PA 940 in Pocono Pines to PA 90 in South Sterling.PA 490 became PA 423 in the 1960s.