(NJ 445)By the early 1950s, a roadway that would connect the George Washington Bridge with eastern Rockland County more efficiently than US 9W was desired, and the park commission began work on the Palisades Interstate Parkway. The road runs from Fort Lee to Bear Mountain, and as with all New York parkways, commercial vehicles are not permitted.
A short stretch of the northbound lanes in Alpine, from the on-ramp at Interchange 2 to the off-ramp for the State Line Lookout, was built atop Henry Hudson Drive. The drive was the original park road, starting half a mile south of the George Washington Bridge and running along the base of the Palisades, past Ross Dock, the Englewood Boat Basin, and Alpine (Huyler’s) Landing before climbing the cliff to State Line Lookout. The original road, now closed to motor-vehicle traffic but open as a footpath, continues north to the state line. US 9W used Skyline Drive (which no longer exists, having been largely supplanted by the PIP) and then Henry Hudson Drive through the State Line Lookout area.
While the PIP is controlled by the Palisades Interstate Park Commission, NJDOT has assigned it reference number 445, the next number in sequence after NJ 444, the Garden State Parkway. The half-mile ramp connecting US 9W with the Parkway in Fort Lee is designated NJ 445S. This spur is plotted below as well.
| Mile | Street Name | Feature (South to North) |
| 0.00 |   BEGINS, Fort Lee Boro |
|
| 0.00 | Palisades Interstate Pkwy | George Washington Bridge     {merge} |
 The Palisades Interstate Parkway starts here, with lanes bearing off at the end of the George Washington Bridge. | ||
 The bridge toll plaza, no toll outbound (which this car is). | ||
| 0.21 | Palisades Interstate Pkwy | (GWB toll plaza) |
| 0.51 | Palisades Interstate Pkwy | Spur to  {merge} |
| 0.76 | Entering Englewood Cliffs Boro | |
| 0.81 | Palisades Interstate Pkwy | (Service area southbound) |
 The northbound service plaza. These stations are popular with New York motorists: while they are more expensive than stations in the towns, they are a lot cheaper than stations in the Empire State. | ||
| 1.06 | Palisades Interstate Pkwy | [Service area northbound] |
| 1.48 | Palisades Interstate Pkwy | Allison Rd {overpass} |
| 1.92 | Palisades Interstate Pkwy | Palisade Ave, Interchange 1 {overpass} |
| 2.95 | Palisades Interstate Pkwy | [Rockefeller Lookout {ramp}] |
| 3.55 | Entering Tenafly Boro | |
| 4.57 | Palisades Interstate Pkwy | Old Dock Rd {overpass} |
| 5.04 | Entering Alpine Boro | |
| 5.77 | Palisades Interstate Pkwy | [Alpine Lookout {ramp}] |
 A bucolic ride: the PIP is posted 50 mph. | ||
| 6.95 | Palisades Interstate Pkwy | Pedestrian crossing {underpass} |
| 7.52 | Palisades Interstate Pkwy | Huyler Landing Rd, Interchange 2 {overpass} |
| 7.64 | Palisades Interstate Pkwy | [Henry Hudson Dr {merge}] |
| 9.12 | Palisades Interstate Pkwy | U-turn ramp, southbound to northbound |
| 9.26 | Palisades Interstate Pkwy | Pedestrian crossing {overpass} |
 Old Henry Hudson Drive (old US 9W) departs here for the State Line Lookout. | ||
| 9.30 | Palisades Interstate Pkwy | [Henry Hudson Dr, to State Line Lookout {ramp}] |
| 9.41 | Palisades Interstate Pkwy | (Palisades Blvd , Interchange 3 {ramp}) |
| 9.61 | Palisades Interstate Pkwy | U-turn ramp, northbound to southbound |
| 10.43 | Palisades Interstate Pkwy | Palisades Blvd , Interchange 4 {overpass} |
 Northbound at the state line. | ||
| 11.06 | ENDS, Alpine Boro |
|
| 0.00 | Entering Orangetown Town, Rockland Co. | |
| 0.00 | NY 987C BEGINS, Orangetown Town | |
| Mile | Street Name | Feature (South to North) |
| 0.00 | NJ 445S BEGINS, Fort Lee Boro | |
| 0.00 | PIP Spur | Fletcher Ave {merge} |
| 0.13 | PIP Spur | Lemoine Ave  {overpass} |
| 0.42 | PIP Spur | Palisades Interstate Pkwy {merge} |
| 0.42 | NJ 445S ENDS, Fort Lee Boro | |