Upper Saucon has three north-to-south numbered routes: Pennsylvania Route 309, Pennsylvania Route 145, and Pennsylvania Route 378. In Lanark, 309 comes north from Philadelphia via Quakertown to join Interstate 78 coming east from New York City and cross the mountain to Allentown.
Upper Saucon has three north-to-south numbered routes Pennsylvania Route 309 Pennsylvania Route 145 and Pennsylvania Route 378 In Lanark 309 comes north from Philadelphia via Quakertown to join Interstate 78 coming east from New York City and cross the mountain to Allentown