High Quality Content by WIKIPEDIA articles! Route 20, known locally as McLean Boulevard, is a state highway that runs 4.15 miles (6.68 km) in New Jersey, United States. It runs along the east side of Paterson, Passaic County, following the west bank of the Passaic River between U.S. Route 46 and River Street (County Route 504), at which point County Route 504 begins. It is a four- to six-lane divided highway most of its length that runs through residential and commercial areas of Paterson, intersecting with Interstate 80 and Route 4 at interchanges. The northernmost part of the route is a county-maintained one-way pair that follows 1st and 2nd Avenues.