An auxiliary U.S. Route is an auxiliary route (alternate route, loop, or spur) designated with an auxiliary sign above (or occasionally below) the route shield, or a suffix after the number in the shield.
The following auxiliary U.S. Routes have existed:
- Defunct routes are listed in italics.
- Routes are sorted by position along the main route, from south to north and west to east.
- Common auxiliary designations are ALT (Alternate), BUS (Business), and BYP (Bypass).
- BUS US 1 - Homestead, Florida
- ALT US 1 - Daytona Beach, Florida to St. Augustine, Florida
- BUS US 1 - St. Augustine, Florida
- ALT US 1 - Jacksonville, Florida
- ALT US 1 - Jacksonville, Florida
- ALT US 1 - Washington, D.C., to Hyattsville, Maryland
- ALT US 1 - Halethorpe, Maryland, to Baltimore, Maryland
- BUS US 1 - Bel Air, Maryland to Hickory, Maryland
- BUS US 1 - Oakford, Pennsylvania to Fallsington, Pennsylvania
- BUS US 1 - Trenton, New Jersey
- ALT US 1 - Trenton, New Jersey
- TRUCK US 1 - Newark, New Jersey to Jersey City, New Jersey
- BUS US 1 - Jersey City, New Jersey to NJ/NY line at New York, New York (now NJ 139 and at-grade portion of Interstate 78)
- US 1A - Stonington, Connecticut
- US 1A - Warwick, Rhode Island to RI/MA line at Attleboro, Massachusetts, via Providence, Rhode Island
- BYPASS US 1 - Portsmouth, New Hampshire to Kittery, Maine
- US 1A - York, Maine
- US 1A - Portland, Maine
- US 1A - Rockland, Maine
- BUS US 1 - Newcastle, Maine to Damariscotta, Maine
- US 1A - Stockton Springs, Maine to Ellsworth, Maine
- BUS US 1A - Bangor, Maine to Brewer, Maine
- US 1A - Milbridge, Maine to Harrington, Maine
- US 1A - Jonesboro, Maine to Machias, Maine
- US 1A - Mars Hill, Maine to Van Buren, Maine
- ALT US 2 - Macwahoc Plantation, Maine to Houlton, Maine
- ALT US 2 - Orono, Maine to Old Town, Maine
- BUS US 2 - Ironwood, Michigan
- BUS US 2 - East Grand Forks, Minnesota to Grand Forks, North Dakota
- BUS US 2 - Minot, North Dakota
- BUS US 2 - Hurley, Wisconsin
- TRUCK US 2 - St. Johnsbury, Vermont
- ALT US 6 - from Woodbury, Connecticut to Columbia, Connecticut
- ALT US 6 - west from Providence, Rhode Island
- BUS US 6 - Lansing, Illinois to Lake Station, Indiana
- BUS US 6 - Carbondale to Scranton, Pennsylvania
- BUS US 6 - Tunkhannock, Pennsylvania
- BUS US 6 - Warren, Pennsylvania
- BYP US 6 - Union City, Pennsylvania
- CITY US 6 - Des Moines, Iowa
- TRUCK US 6 - West Point, New York
- ALT US 13 - Camden, Delaware
- ALT US 13 - Dover, Delaware
- ALT US 13 - Wilmington, Delaware
- BUS US 13 - Bridgeville, Delaware
- BUS US 13 - Wilmington, Delaware
- BUS US 13 - Pocomoke City, Maryland
- BUS US 13 - Salisbury, Maryland
- BYP US 13 - Marcus Hook, Pennsylvania
- BYP US 13 - Chester, Pennsylvania
- BYP US 13 - Philadelphia, Pennsylvania
- ALT US 14 - Spearfish, South Dakota to Sturgis, South Dakota
- ALT US 14 - Cody, Wyoming to Burgess Junction, Wyoming
- BUS US 14 - Woodstock, Illinois
- BUS US 14 - Dodge Center, Minnesota
- BUS US 14 - Janesville, Wisconsin
- BUS US 14 - Madison, Wisconsin
- BUS US 14 - Sheridan, Wyoming
- BYP US 14 - Brookings, South Dakota
- BYP US 14 - Pierre, South Dakota
- ALT US 16 - Novi, Michigan to Farmington, Michigan
- ALT US 16 - Nunica, Michigan to Muskegon, Michigan
- BUS US 16 - Farmington, Michigan
- BUS US 16 - Grand Rapids, Michigan
- ALT US 16 - Wall, South Dakota to Kadoka, South Dakota
- ALT US 16 - Custer, South Dakota to Keystone, South Dakota
- ALT US 16 - Custer, South Dakota to Keystone, South, Dakota
- BUS US 16 - Rapid City, South Dakota
- BUS US 16 - Watertown, Wisconsin
- BYP US 16 - Grand Rapids, Michigan
- BYP US 16 - Hill City, South Dakota
- BYP US 16 - Rapid City, South Dakota
- ALT US 17 - Georgetown, South Carolina to Pocotaligo, South Carolina
- ALT US 17 - Savannah, Georgia
- ALT US 17 - Jacksonville, Florida
- ALT US 17 - Jacksonville, Florida
- BUS US 17 - Fredericksburg, Virginia
- BUS US 17 - Elizabeth City, North Carolina
- TRUCK BUS US 17 - Elizabeth City, North Carolina
- BUS US 17 - Jacksonville, North Carolina
- BUS US 17 - Wilmington, North Carolina
- BUS US 17 - Bolivia, North Carolina
- BUS US 17 - Shallotte, North Carolina
- BUS US 17 - Myrtle Beach, South Carolina
- TRUCK US 17 - Kissimmee, Florida
- TRUCK US 17 - Winter Park, Florida
- ALT US 20 - Suger City to Victor, Idaho
- ALT US 20 - Tremont to Michigan City, Indiana
- US 20A - Hamburg to East Bloomfield, New York
- US 20A - Pioneer to Maumee, Ohio (originally US 20S)
- BUS US 20 - Chicago, Illinois
- BUS US 20 - Elgin, Illinois
- BUS US 20 - Freeport, Illinois
- BUS US 20 - Rockford to Belvidere, Illinois
- BUS US 20 - South Bend, Indiana
- BUS US 20 - Bend, Oregon
- BUS US 20 - Toledo, Oregon
- BYP US 20 - South Bend, Indiana
- CITY US 20 - Chicago, Illinois
- TRUCK US 20 - Elkhart, Indiana
- TRUCK US 20 - Osceola, Indiana
- TRUCK US 20 - Silver Creek, New York
- BUS US 21: Elkin, NC
- BUS US 21: Fort Mill, SC
- BUS US 21: Rock Hill, SC
- BUS US 21: Orangeburg, SC
- BUS US 21: Beaufort, SC
- BYP US 21: Elkin, NC
- SPUR US 21: Columbia, SC
- SPUR US 21: Orangeburg, SC
- ALT US 23 - Saginaw, Michigan to Bay City, Michigan
- ALT US 23 - Kawkawlin, Michigan to south of Standish, Michigan
- ALT US 23 - Mars Hill, North Carolina to Faust, North Carolina
- BUS US 23 - Ann Arbor, Michigan
- BUS US 23 - Bay City, Michigan
- BUS US 23 - Bridgeport, Michigan to Saginaw, Michigan
- BUS US 23 - Fenton, Michigan
- BUS US 23 - Rogers City, Michigan
- BYP US 23 - Pikeville, Kentucky
- BYP US 23 - Pound, Virginia
- TRUCK US 23 - Portsmouth, Ohio
- ALT US 27 - Sebring, Florida to Avon Park, Florida
- ALT US 27 - north of Avon Park, Florida to Haines City, Florida
- ALT US 27 - Lady Lake, Florida to Belleview, Florida
- ALT US 27 - Williston, Florida to Perry, Florida
- ALT US 27 - Carrollton, Georgia to Columbus, Georgia - signed with GA Alt 85 between Warm Springs, Georgia and Shiloh, Georgia; then with GA 85 to Columbus, Georgia.
- ALT US 27 - Shepherd, Michigan
- BUS US 27 - Charlotte, Michigan (replaced by BL I-69)
- BUS US 27 - Lansing, Michigan (replaced by unsigned BUS US 127)
- BUS US 27 - St. Johns, Michigan (replaced by BUS US 127)
- BUS US 27 - Ithaca, Michigan (replaced by BUS US 127)
- BUS US 27 - Alma, Michigan (replaced by BUS US 127)
- BUS US 27 - St. Louis, Michigan (replaced by BUS US 127)
- BUS US 27 - Mt. Pleasant, Michigan (replaced by BUS US 127)
- BUS US 27 - Clare, Michigan (replaced by BUS US 127)
- BUS US 27 - Harrison, Michigan (replaced by BUS US 127)
- TRUCK US 27 - Lansing, Michigan
- BUS US 30 - Portland, Oregon
- BYP US 30 - Portland, Oregon
- BUS US 30 - Huntington, Oregon
- BUS US 30 - Ontario, Oregon
- BUS US 30 - Frazer, Pennsylvania to Parkesburg, Pennsylvania
- ALT US 30 - Fulton, Illinois to Clinton, Iowa across the Mississippi River
- ALT US 30 - Lynwood to Sterling, Illinois
- BUS US 30 - Aurora, Illinois
- CITY US 30 - Aurora, Illinois
- TOLL US 30 - Ford Heights to Aurora, Illinois
- ALT US 31 - Beulah, Michigan
- ALT US 31 - Ludington, Michigan
- ALT US 31 - Nashville, Tennessee to Pulaski, Tennessee
- BUS US 31 - Ludington, Michigan
- BUS US 31 - Hart, Michigan
- BUS US 31 - Muskegon, Michigan
- BUS US 31 - Holland, Michigan
- BUS US 31 - South Haven, Michigan
- BUS US 31 - Whitehall, Michigan and Montague, Michigan
- BUS US 31 - South Bend, Indiana
- BYP US 31 - South Bend, Indiana - may or may not have existed
- BYP US 31 - Kokomo, Indiana
- ALT US 40 - Uniontown, Pennsylvania
- ALT US 40 - Washington, Pennsylvania
- ALT US 40 - Keyser's Ridge to Cumberland
- ALT US 40 - Hagerstown to Frederick in Maryland
- BUS US 40 - Hopwood to Uniontown, Pennsylvania
- Scenic US 40 - Bellegrove, Maryland and Piney Grove, Maryland
- THRU US 40 - Washington, Pennsylvania
- BYP US 40 - Wentzville, Missouri to Troy, Illinois
- ALT US 40 - St. Louis, Missouri
- TRUCK US 40 - Frontenac, Missouri - St. Louis
- BUS US 40 - St. Louis, Missouri
- BUS US 40 - Columbia, Missouri
- BUS US 40 - Kansas City, Kansas
- BUS US 40 - Russell, Kansas
- BUS US 40 - Wa Keeney, Kansas
- BUS US 41 - Fort Myers, Florida
- BUS US 41 - Venice, Florida
- BUS US 41 - Bradenton, Florida
- BUS US 41 - Tampa, Florida
- BUS US 41 - Macon, Georgia
- ALT US 41 - Madisonville, Kentucky to Henderson, Kentucky
- BUS US 41 - Baraga, Michigan
- BUS US 41 - Marquette, Michigan
- TOLL US 41 - Lansing to Antioch, Illinois, the original marking for the Tri-State Tollway
- ALT US 41 - Negaunee to Ishpeming, Michigan
- BYP US 45 - Jackson, Tennessee
- BUS US 45W- Humboldt, Tennessee
- U.S. Route 45E
- U.S. Route 45W
- U.S. Route 45 Alternate in Tupelo, Mississippi
- U.S. Route 45 Business in Wittenburg, Wisconsin
- U.S. Route 45 Business in New London, Wisconsin
- U.S. Route 45 Business in Paducah, Kentucky
- U.S. Route 45 Bypass in Jackson, Tennessee
- U.S. Route 45W Business in Trenton, Tennessee Decommissioned and resigned as Tennessee State Route 367
- U.S. Route 45W Business in Humboldt, Tennessee
- U.S. Route 45E Business in Martin, Tennessee
- U.S. Route 45 Business in Tupelo, Mississippi
- U.S. Alt 45 Tupelo, Mississippi to Brooksville, Mississippi
- U.S. Route 45 Business in Meridian, Mississippi
- BUS US 50 - Original routing though Salisbury, Maryland
- BYP US 50 - Cleves, Ohio to Milford, Ohio
- BUS US 50 - Brentwood - St. Louis, Missouri
- BYP US 50 - Mehlville, Missouri to Fairview Heights, Illinois
- BUS US 50- Warrensburg, Missouri
- ALT US 50 - Fernley, Nevada to Fallon, Nevada
- ALT US 50 - signed, but unofficial, route between Pollock Pines, California to South Lake Tahoe, California
- BUS US 59 - Texarkana, Arkansas
- BUS US 59 - Carthage, Texas
- BUS US 59 - Nacogdoches, Texas
- BUS US 59 - Lufkin, Texas
- BUS US 59 - Livingston, Texas
- BUS US 59 - Splendora, Texas
- BUS US 59 - Hungerford and Wharton, Texas
- BUS US 59 - El Campo, Texas
- BUS US 59 - Victoria, Texas
- BUS US 59 - George West, Texas
Main article at Bannered routes of U.S. Route 60.
- TEMP US 60 - Globe - Springerville, Arizona
- BUS US 60 - Tonkawa, Oklahoma
- BUS US 60 - Ponca City, Oklahoma
- BUS US 60 - Seneca, Missouri
- BUS US 60 - Neosho, Missouri
- BUS US 60 - Monett, Missouri
- BUS US 60 - Verona-Aurora, Missouri
- BUS US 60 - Springfield, Missouri
- BUS US 60 - Rogersville, Missouri
- BUS US 60 - Mansfield, Missouri
- BUS US 60 - Mountain Grove, Missouri
- BUS US 60 - Cabool, Missouri
- BUS US 60 - Willow Springs, Missouri
- BUS US 60 - Van Buren, Missouri
- BUS US 60 - Poplar Bluff, Missouri
- BUS US 60 - Dexter, Missouri
- BUS US 60 - Sikeston, Missouri
- BUS US 60 - Paducah, Kentucky
- BYP US 60 - Owensboro, Kentucky
- BUS US 60 - Cloverport, Kentucky
- ALT US 60 - Louisville, Kentucky
- BUS US 60 - Versailles, Kentucky
- BYP US 60 - Versailles, Kentucky
- BUS US 60 - Lexington, Kentucky
- BYP US 60 - Lexington, Kentucky
- TRUCK US 60 - Charleston, West Virginia
- Bus US 60 - Clifton Forge, Virginia
- BUS US 62 - Niagara Falls, New York
- BUS US 62 - Fayetteville, Arkansas
- BUS US 62 - Rogers, Arkansas
- BUS US 62 - Muskogee, Oklahoma
- BUS US 62 - Yellville, Arkansas
- BUS US 62 - Mountain Home, Arkansas
- BUS US 62 - Salem, Arkansas
- BUS US 62 - Cotter, Arkansas
- BUS US 62 - Flippin, Arkansas proposed
- BUS US 62 - Eureka Springs, Arkansas
- BUS US 62 - Henryetta, Oklahoma
- BYP US 62 - Sharon, Pennsylvania
- Spur US 62 - Pyatt, Arkansas
- Spur US 62 - Berryville, Arkansas
- BUS US 64 - Alma, Arkansas
- BUS US 64 - Beebe, Arkansas
- BUS US 64 - Augusta, Arkansas
- BUS US 64 - McCrory, Arkansas
- BUS US 64 - Wynne, Arkansas
- BUS US 64 - Parkin, Arkansas
- BUS US 64 - Crawfordsville, Arkansas
- BUS US 64 - Earle, Arkansas
- BUS US 64 - Muskogee, Oklahoma
- BUS US 64 - Selmer, Tennessee
- BYP US 64 - Cleveland, Tennessee
- BUS US 64 - Pittsboro, North Carolina
- BUS US 64 - Knightdale, North Carolina
- BUS US 65 - Hollister, Missouri - Branson, Missouri
- BUS US 65 - Springfield, Missouri
- BYP US 65 - Springfield, Missouri
- BUS US 65 - Ozark, Missouri
- BUS US 65 - Harrison, Arkansas
- BUS US 65 - Pine Bluff, Arkansas
- BUS US 65 - Clinton, Arkansas
- BUS US 65 - Conway, Arkansas
- BUS US 65 - Western Grove, Arkansas
Main article at Bannered routes of U.S. Route 66.- ALT US 66 - Bolingbrook, Illinois - Gardner, Illinois
- BUS US 66 - Towanda, Illinois - Bloomington, Illinois
- BUS US 66 - Lincoln, Illinois
- BUS US 66 - Springfield, Illinois
- BUS US 66 - Mitchell, Illinois - East St. Louis, Illinois
- BUS US 66 - St. Louis, Missouri - Sunset Hills, Missouri
- BYP US 66 - St. Louis, Missouri - Sunset Hills, Missouri
- OPT US 66 - St. Louis, Missouri
- BUS US 66 - Springfield, Missouri
- ALT BUS US 66 - Springfield, Missouri
- ALT US 66 - Carthage, Missouri - Kendricktown, Missouri
- BUS US 66 - Carterville, Missouri - Webb City, Missouri
- ALT US 66 - Webb City, Missouri - Joplin, Missouri
- BUS US 66 - Joplin, Missouri
- BYP US 66 - Joplin, Missouri
- BUS US 66 - Tulsa, Oklahoma
- BUS US 66 - Oklahoma City, Oklahoma
- BUS US 66 - Amarillo, Texas
- BUS US 66 - San Bernardino, California
- ALT US 66 - Pasadena, California - Los Angeles, California
- BYP US 67 - metro St. Louis, Missouri
- BUS US 67 - Searcy, Arkansas
- BUS US 67 - Beebe, Arkansas
- BUS US 67 - Walnut Ridge, Arkansas
- BUS US 67 - Poplar Bluff, Missouri
- BUS US 67 - Fredericktown, Missouri
- BUS US 67 - Sulphur Springs, Texas
- BUS US 67 - Greenville, Texas
- BUS US 67 - Midlothian, Texas
- BUS US 67 - Alvarado, Texas
- BUS US 67 - Cleburne, Texas
- BUS US 67 - San Angelo, Texas - note there are technically 2 different Business 67 designations in San Angelo (67-H and 67-J).
- BUS US 67 - Presidio, Texas
- BUS US 69 - Trenton, Texas
- BUS US 69 - Greenville, Texas
- BUS US 69 - Lufkin, Texas
- BUS US 69 - Durant, Oklahoma
- BUS US 69 - McAlester, Oklahoma
- BUS US 69 - Eufaula, Oklahoma
- BUS US 69 - Checotah, Oklahoma
- ALT US 69 - south of Pittsburg, Kansas - north of Miami, Oklahoma
- BUS US 69 - Pittsburg, Kansas
Main article at Bannered routes of U.S. Route 71.
- BUS US 71 - Clarinda, Iowa
- BYP US 71 - Platte City, Missouri
- BUS US 71 - Kansas City, Missouri
- BYP US 71 - Harrisonville, Missouri - Kansas City, Missouri
- BUS US 71 - Nevada, Missouri
- BUS US 71 - Carthage, Missouri - Tipton Ford, Missouri
- ALT US 71 - Carthage, Missouri - Neosho, Missouri
- BUS US 71 - Neosho, Missouri
- BUS US 71 - Anderson - Pineville, Missouri
- TEMP US 71 - Lanagan, Missouri - Bentonville, Arkansas
- BUS US 71 - Bentonville, Arkansas
- BUS US 71 - Bentonville, Arkansas - Fayetteville, Arkansas
- SPUR US 71 - Fayetteville, Arkansas
- BUS US 71 - Alma, Arkansas - Fort Smith, Arkansas
- BUS US 71 - Waldron, Arkansas
- BUS US 77 - Brownsville, Texas
- BUS US 77 - Combes, Harlingen, and San Benito, Texas
- BUS US 77 - Raymondville, Lyford, and Sebastian, Texas
- BUS US 77 - Bishop and Kingsville, Texas
- BUS US 77 - Robstown, Texas
- BUS US 77 - Sinton, Texas
- BUS US 77 - Victoria, Texas
- BUS US 77 - Yoakum, Texas
- BUS US 77 - Waco, Texas
- BUS US 81 - San Antonio, Texas
- BUS US 81 - Rhome, Texas
- BUS US 81 - Decatur, Texas
- BUS US 81 - Alvord, Texas
- BYP US 81 - Wichita, Kansas
- BYP US 81 - McPherson, Kansas - Now K-153, but county-installed street signs still reference BYP US 81.
- BYP US 81 - Salina, Kansas
- BUS US 81 - Fargo, North Dakota
- BUS US 81 - Grand Forks, North Dakota
- ALT US 90 - Seguin, Texas to Houston, Texas
- BUS US 90 - Crosby, Texas to Houston, Texas
- BUS US 90 - Orange, Texas
- BUS US 90 - New Orleans, Louisiana
- ALT US 90 - Pensacola, Florida
- ALT US 90 - Quincy, Florida to Tallahassee, Florida
- TRUCK US 90 - Lake City, Florida
- ALT US 90 - Jacksonville, Florida
- ALT US 91 - Jean, Nevada to Las Vegas, Nevada
- ALT US 91 - Farmington, Utah to North Salt Lake, Utah
- ALT US 91 - Ogden, Utah to North Salt Lake, Utah
- ALT US 91 - Salt Lake City, Utah
- BUS US 91 - San Bernadino, California to Colton, California
- BUS US 91 - Victorville, California
- BUS US 91 - Blackfoot, Idaho
- BUS US 91 - Idaho Falls, Idaho
- BUS US 91 - Inkom, Idaho
- BUS US 91 - McCammon, Idaho
- BUS US 91 - Pocatello, Idaho
- BUS US 91 - Helena, Montana
- BYP US 91 - Butte, Montana
- ALT US 98 - Panama City Beach, Florida
- BUS US 98 - Bartow, Florida
- BUS US 98 - Dade City, Florida
- BUS US 98 - Lakeland, Florida
- BUS US 98 - Panama City, Florida
- BUS US 98 - Pensacola, Florida
- BYP US 98 - Panama City Beach, Florida
- TOLL US 98 - Pensacola, Florida to Navarre, Florida
- TRUCK US 98 - Brooksville, Florida
- TRUCK US 98 - Dade City, Florida
- ALT US 99 - Bellingham, Washington to the Canadian border
- ALT US 99 - Burlington to Bellington, Washington
- ALT US 99 - Riverton Heights to Seattle, Washington
- BUS US 99 - Atwater, California
- BUS US 99 - Banning, California
- BUS US 99 - Fresno, California
- BUS US 99 - Merced, California
- BUS US 99 - Pomona, California
- BUS US 99 - Sacramento, California
- BUS US 99 - Sylmar, California
- BUS US 99 - Green, Oregon
- BUS US 99 - Salem, Oregon
- BUS US 99 - Seattle, Washington
- BYP US 99 - Seattle, Washington
- BYP US 99 - Salem, Oregon
- BUS US 127 - Hustonville, Kentucky
- BYP US 127 - Danville, Kentucky
- BYP US 127 - Harrodsburg, Kentucky
- BYP US 127 - Lawrenceburg, Kentucky
- BUS US 127 - Alma, Michigan
- BUS US 127 - Clare, Michigan
- BUS US 127 - Harrison, Michigan
- BUS US 127 - Ithaca, Michigan
- BUS US 127 - Jackson, Michigan
- BUS US 127 - Mason, Michigan
- BUS US 127 - Mt. Pleasant, Michigan
- BUS US 127 - St. Johns, Michigan
- BUS US 127 - St. Louis, Michigan
- ALT US 127 - Hamilton, Ohio
- BUS US 127 - Greenville, Ohio
- TRUCK US 127 - Cincinnati, Ohio
- BUS US 281 - Edinburg, Texas
- BUS US 281 - Encino, Texas
- BUS US 281 - Falfurrias, Texas
- BUS US 281 - Alice, Texas
- ALT US 281 - Sunniland, Texas to Campbellton, Texas
- BUS US 281 - Wichita Falls, Texas
- BUS US 281 - Lawton, Oklahoma
- SPUR US 281 - West of El Reno, Oklahoma
- BYP US 281 - Great Bend, Kansas
- TRUCK US 281 - Jamestown, North Dakota
- BUS US 287 - Grapeland, Texas
- BUS US 287 - Corsicana, Texas
- BUS US 287 - Ennis, Texas
- BUS US 287 - Waxahachie, Texas
- BUS US 287 - Midlothian, Texas
- BUS US 287 - Fort Worth, Texas
- BUS US 287 - Wichita Falls, Texas
- BUS US 287 - Electra, Texas
- BUS US 287 - Vernon, Texas
- BUS US 287 - Amarillo, Texas
See also
External links