The route is a four- to six-lane road its entire length, with portions of it being a divided highway that runs through urban areas.

[3] US 1/9 Truck begins at an interchange with access to and from the southbound direction US 1/9, the Pulaski Skyway, in the Ironbound section of the city of Newark in Essex County.

A short distance later, the road comes to an interchange with the New Jersey Turnpike (Interstate 95, or I-95) and Doremus Avenue before crossing over the Passaic River on a vertical lift bridge.

[1] Here, the route enters Kearny in Hudson County and continues east into industrial areas as the Lincoln Highway.

[1][5] From here, US 1/9 Truck passes under a Conrail Shared Assets Operations (CSAO) railroad line and becomes a six-lane expressway, coming to an at-grade intersection with Hackensack Avenue.

[1] Past this intersection, the road crosses the Hackensack River on a vertical lift bridge and enters Jersey City.

Upon entering Jersey City, the road becomes Communipaw Avenue and intersects the northern terminus of Route 440 near the Hudson Mall.

Here, the road becomes a four-lane divided highway again, passing some urban business areas before running between wetlands to the west and Holy Name Cemetery to the east.

The route heads into more commercial areas again before passing urban residences, coming to an intersection that provides access to the Pulaski Skyway.

[1] The truck route becomes a four-lane divided highway called the St. Paul's Viaduct that runs to the north of the Pulaski Skyway and passes through industrial sectors, crossing over the Northern Branch line and CR 646.

A replacement ramp to reallow traffic onto Newark Avenue after the ability to do so was removed at the intersection was opened on April 21, 2023, at 9:00 pm.