 This also serves as PA 423's northern terminus, as the right-of-way merges into PA 191.When Pennsylvania first legislated routes in 1911, the present-day alignment of PA 423 was not given a number.In 1928, PA 490 was designated to run from US 611 (now PA 611) in Tobyhanna northeast to PA 90 (now PA 191) in Laanna.