Millstone Bus Line - suburban served New Brunswick, Manville, Somerville, Raritan.
Mount Bethel Bus Service - connected Plainfield with Mount Bethel, Warrenville, Bound Brook, Martinsville.
Peoples Bus Service - city service in Bound Brook and vicinity.
Strang Bus Lines - suburban served Plainfield, Summit.
Rossmeyer & Weber Bus Lines - suburban service around Metuchen.
Starr Transit Co. - served New Brunswick, Dayton, Deans, Hightstown, Robbinsville, Trenton.