The bridge carrying the parkway over the Raritan River opened on July 30, 1954, and the bridge over the Passaic River opened on May 26, 1955. This extended the parkway's northern terminus to US 46 in present-day Elmwood Park. On July 1 of that year, the portion of the highway from US 46 to Route 17 in Paramus opened. Before the Great Egg Harbor Bridge was completed in 1956, the parkway temporarily detoured onto US 9 and over the Beesley's Point Bridge. That bridge was closed in 2004 and demolished in 2014; US 9 now detours onto the parkway instead.