A short distance later, Route 507 passes West Hudson Park and turns to the northeast, entering a mainly commercial district of Harrison.

After an intersection with Midland Avenue, the highway crosses Norfolk Southern's Boonton Line through Arlington, which formerly carried NJ Transit trains until it was abandoned on September 20, 2002.

Soon after, County Route 507 passes the former Royce Chemical Standard and Bleachery,[5] where it changes names to Carlton Avenue for entering East Rutherford.

County Route 507 continues northward, passing local residences for several blocks, until reaching an intersection with Main Avenue near the Passaic River.

Interstate 80 interchanges with Route 507 and continues northward, crossing the New York, Susquehanna and Western Railway's New Jersey Subdivision line near Summit Avenue.

The highway continues northwestward as a mix of residential and commercial businesses partially interchanging with New Jersey Route 4 in now Elmwood Park.

South Maple Avenue continues northward as a residential highway, turning from the north to the northeast into the community of Glen Rock, where it crosses New Jersey Transit's Bergen County Line.

After curving to the northeast at Undercliff Court, the highway continues north through Ridgewood until crossing 1st Street, where it enters the town of Ho-Ho-Kus.

They soon pass a local cemetery and enter the downtown of Waldwick, where County Route 502 forks to the west via Wyckoff Avenue.

County Route 507 continues northward along Franklin Turnpike, heading through downtown Waldwick as a four-lane arterial, passing east of the local train station.

The highway turns to the northwest once again, returning to the residential surroundings until crossing into Allendale near Mackay Avenue, where it becomes commercial once again.

County Route 507 continues northward along the Franklin Turnpike through the northern reaches of Ramsey, intersecting with Spring Street.

[3] In Mahwah, County Route 507 continues northwestward along the Franklin Turnpike, passing a large industrial district and nearby local residences.

The road passes east of some local residential complexes, intersecting with County Route 100 (Ramapo Avenue) in downtown Mahwah.

The final stretch of the Franklin Turnpike is mostly commercial, passing several local businesses and intersecting with U.S. Route 202 just south of the state border.

This provides the northern terminus of County Route 507 and the Franklin Turnpike continues for a short 0.03 miles (0.048 km) long stretch to the New York state line in Mahwah.