New Jersey Route 101 was planned to begin at Harrison Avenue in Kearny, Hudson County. From here, the route was to head north into the New Jersey Meadowlands in Bergen County, where it would pass through Lyndhurst, Rutherford, and East Rutherford. Route 101 would continue north through Carlstadt before running in between Moonachie Road and the Hackensack River. The route was to pass through Little Ferry and into the eastern part of Hackensack, where Route 101 was to terminate at an intersection with Route 4. From this point, Route S101 was planned to continue north to the New York border in Montvale. Route 101
River Vale, New Jersey section bordering Emerson to the south, Harrington Park to the southeast, Old Tappan to the east, and Pearl River, New York to the north. Its borders are defined by the Hackensack River to the east, which was dammed to form Lake Tappan, and Pascack Brook to the south. The northern border is defined by the New York-New Jersey state border. The western border has several sections, including a section defined by an unnamed creek and a section defined by Cedar Lane. The southern portion of the township lies between the Hackensack River and Pascack Brook, and is relatively flat. The