The following highways are numbered 446:
Japan Japan National Route 446
United States Indiana State Road 446 Kentucky Route 446 Maryland Route 446 Nevada State Route 446 New Jersey Route 446 (unsigned designation for the Atlantic City Expressway) New Jersey Route 446X (unsigned designation for the Atlantic City–Brigantine Connector) New Mexico State Road 446 New York State Route 446 Ohio State Route 446 Pennsylvania Route 446 Puerto Rico Highway 446