 In New Jersey, US 9 mainly runs parallel to the Garden State Parkway, and in New York, most of US 9 runs parallel to I-87.US 9 runs an east–west path through Sussex County, running east from U.S. Route 13 in Laurel, passing through Georgetown, east to Lewes, where it leads to the Cape May–Lewes Ferry, which carries US 9 across the Delaware Bay to New Jersey.US 9 was extended to Delaware by way of the Cape May–Lewes Ferry in 1974, replacing Delaware Route 28 between Laurel and Georgetown and Delaware Route 18 between Georgetown and Lewes.