highway numbering pattern in usa
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HIGHWAY NUMBERING PATTERN IN USA
The system of United States numbered highways (often called U.S. Routes or U.S.
Highways) is an integrated system ofroads and highways in the UnitedStates numbered within a nationwide grid. As these highways were coordinated among
the states, they are infrequently referred to as Federal Highways, but they have always
been maintained by state or local governments since their initial designation in 1926.
The numbers and locations are coordinated by the American Association of State
Highway and Transportation Officials (AASHTO). The only federal involvement in the
AASHTO is a non-voting seat for theUnited States Department of Transportation. North
to south highways are odd-numbered, with lowest numbers in the east and highest
numbers in the west. Similarly, west to east highways are even-numbered, with the
lowest numbers in the north and highest numbers in the south. Major north-south routes
have numbers ending in "1" while major east-west routes have numbers ending in "0".
Three-digit numbered highways are spur routes of each parent highway but are not
necessarily connected to their parent route. Divided routes exist to provide two
alignments to one route, even though many have been eliminated, while special routes,
usually posted with a banner, can provide various routes, such as an alternate or
bypass route, for a U.S. Highway. TheInterstate Highway System has largely replaced
the U.S. Highways for through traffic, though many important regional connections are
still made by U.S. Highways, and new routes are still being added.
Prior to the U.S. Highways, auto trails were predominant in marking roads through the
United States. In 1925, the Joint Board on Interstate Highways, recommended
by American Association of State Highway Officials (AASHO), worked to form a national
numbering system for roads. After several meetings, a final report was approved by
the Department of Agriculturein November 1925. After numerous complaints from
across the country about the assignment of routes, several modifications were made
and the U.S. Highway System was approved in November 1926. As a result of
compromises made to get the U.S. Highway System approved, many routes divided intotwo alignments to serve different towns. In subsequent years, the AASHTO called for
splits in U.S. Highways to be eliminated. Expansion of the system continued until 1956
when the Interstate Highway System was formed and many U.S. Highways were
replaced by Interstate Highways.
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NUMBERING
The two-digit U.S. Routes follow a simple grid, in which odd-numbered routes run
generally north to south and even-numbered routes run generally west to east. (U.S.
Route 101 is considered a two-digit route, its first "digit" being ten.) Numbers generallyincrease from 1 in the east to 101 in the west and 2 in the north to 98 in the south.
Numbers ending in zero or one (and U.S. Route 2), and to a lesser extent in five, were
considered main routes in the early numbering, but extensions and truncations have
made this distinction largely meaningless; for instance, U.S. Route 6 was until 1964 the
longest route (that distinction now belongs to U.S. Route 20). The Interstate System
grid, which increases from west to east and south to north, is intentionally opposite from
the U.S. grid, to keep identically numbered routes apart and keeping them from being
confused.
Three-digit numbers are assigned to spurs of two-digit routes. For instance, U.S. Route
201 splits from U.S. Route 1 at Brunswick, Maine and runs north to Canada. Not all
spurs travel in the same direction as their "parents"; some are only connected to their
"parents" by other spurs, or not at all, instead only traveling near their "parents". As
originally assigned, the first digit of the spurs increased from north to south and east to
west along the "parent"; for example, U.S. Route 60 junctioned, from east to west, U.S.
Route 160 in Missouri, U.S. Route 260 inOklahoma, U.S. Route 360 in Texas, and U.S.
Route 460 and U.S. Route 560 in New Mexico. As with the two-digit routes, three-digit
routes have been added, removed, extended and shortened; the "parent-child"
relationship is not always present. Several spurs of the decommissioned U.S. Route
66 still exist, and U.S. Route 191 travels from border to border, while U.S. Route 91 has
been largely replaced by Interstate 15.
Several routes approved since 1980 do not follow the pattern:
U.S. Route 400, approved in 1994, has no "parent" as there is no U.S. Route 0 or
U.S. Route 100.
U.S. Route 412, approved ca. 1982, is nowhere near U.S. Route 12. U.S. Route 425, approved in 1989, is nowhere near U.S. Route 25.
In addition, U.S. Route 163, designated in 1970, is nowhere near U.S. Route 63. The
short U.S. Route 57, approved ca. 1970, connects to Federal Highway 57 in Mexico,
and lies west of former U.S. Route 81.
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While AASHTO guidelines specifically prohibit Interstate Highways and U.S. Highways
from sharing a number within the same state (which is why there are no Interstates 50
or 60), the initial Interstate numbering approved in 1958 violated this with Interstate
24 and U.S. Route 24 in Illinois and Interstate 40, Interstate 80, U.S. Route 40 and U.S.
Route 80 in California (US 40 and US 80 were removed from California in its 1964
renumbering). Some recent and proposed Interstates, some of them out-of-place in the
grid, also violate this: Interstate 41 and U.S. Route 41 in Wisconsin (which will
run concurrently), Interstate 49 and U.S. Route 49 in Arkansas, Interstate 69 and U.S.
Route 69 in Texas, and Interstate 74 and U.S. Route 74 in North Carolina (which run
concurrently).
For reasons unknown to even the department of transportation, there are never any
U.S. routes numbered 39, 47, 86 and 88.
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Following are the various highways in USA:-US 1 US 19
Number South or west terminus North or east terminusLength
(km)
US 1 Key West, FL Canada (Fort Kent, ME) 3825
US 201 Brunswick, ME (US 1) Canada 253
US 301 Sarasota, FL (US 41)
Southwest of Wilmington, DE (I-295, US
13, US 40)
Formerly Baltimore, MD
1788
US 401 Sumter, SC (US 76, US 521) North of Norlina, NC (I-85,US 1) 414
US 501 Myrtle Beach, SC (US 17 Bus.)Buena Vista, VA (US 60)
Formerly Burkeville, VA571
US 601South of Furman, SC (US 321)
Formerly Florence, SC, thenHardeeville, SCMount Airy, NC (US 52) 513
US 701Georgetown, SC (US 17)
Formerly Charleston, SCSouthwest of Smithfield, NC (I-95, US 301) 277
US 2Everett, WA (I-5)
Canada (Rouses Point, NY)
St. Ignace, MI (I-75)
Formerly Canada (Sault Ste. Marie, MI)
Canada (Houlton, ME)
4152
US 202Northwest of New Castle, DE(US 13, US
40, US 301)Bangor, ME (US 1 Alt., I-395) 1009
US 302 Montpelier, VT (US 2) Portland, ME (I-295, US 1) 275
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US 3 Boston, MA (US 20) Canada 439
US 4 Southeast of Albany, NY (US 9, US 20) Portsmouth, NH (I-95, US 1 Byp.) 412
US 5 New Haven, CT (I-91) Canada (Derby Line, VT) 483
US 6Bishop, CA (US 395)
Formerly Long Beach, CAProvincetown, MA 5161
US 206 Hammonton, NJ (US 30) Milford, PA (US 6, US 209) 211
US 7Norwalk, CT (I-95)
Formerly New York, NYCanada 497
US 8Forest Lake, MN (I-35)
Formerly Minneapolis, MNNorway, MI (US 2) 452
US 9 Laurel, DE (US 13) Canada 838
US 209Millersburg, PA
Formerly northwest of Dauphin, PAKingston, NY (US 9W) 349
US 10West Fargo, ND (I-90)
Ludington, MI (ferry)
Manitowoc, WI (ferry)
Bay City, MI (I-75, US 23)1144
US 310 Greybull, WY (US 14, US 16,US 20) Laurel, MT (I-90, US 212) 174
US 11 East of New Orleans, LA (US 90) Canada (Rouses Point, NY) 2647
US 211 New Market, VA (I-81) Warrenton, VA (US 15 Bus., US 29 Bus.) 98
US 311 Randleman, NC (US 220) Eden, NC 126
US 411 Leeds, AL (US 78) Greeneville, TN (US 11E,US 321) 549
US 12 Aberdeen, WA (US 101) Detroit, MI 3996
US 212 Yellowstone National Park, WY Eden Prairie, MN (US 169) 1532
US 13 Northeast of Fayetteville, NC(I-95) Morrisville, PA 847
US 113 Pocomoke City, MD (US 13) Milford, DE 117
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US 14 Yellowstone National Park, WY Chicago, IL (US 41) 2250
US 15 Walterboro, SC (US 17 Alt.) West of Corning, NY (I-86) 1278
US 16 Yellowstone National Park, WY Rapid City, SD (I-90, US 14) 787
US 17 Punta Gorda, FL (US 41) Winchester, VA (US 11,US 50, US 522) 1914
US 117 Wilmington, NC West of Wilson, NC (I-95,US 264) 198
US 18Southeast of Douglas, WY (I-25, US 20, US
26, US 87)Milwaukee, WI 1662
US 218 Keokuk, IA (US 136) Owatonna, MN (I-35, US 14) 513
US 19 North of Bradenton, FL (US 41) Erie, PA (US 20) 2231
US 119 Pineville, KY (US 25E) South of DuBois (US 219) 941
US 219 Rich Creek, VA (US 460) Southeast of Buffalo, NY (I-90) 861
US 319 Apalachicola, FL (US 98) Wadley, GA (US 1) 512
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US 20 US 39
NumberSouth or west
terminus
North or east terminusLength
(km)
US 20Newport, OR (US 101)
Yellowstone National Park, MT, WYBoston, MA 5209
US 220 Rockingham, NC (US 1) Waverly, NY (I-86) 1096
US 21 East of Beaufort, SC Wytheville, VA (I-81, US 52) 632
US 121 Pound, VA (US 23) Beckley, WV (I-64, I-77) 180
US 221 Perry, FL (US 19, US 27 Alt., US 98)Lynchburg, VA (US 29 Bus., US 460 Bus., US
501 Bus.)1181
US 321 Hardeeville, SC (US 17) Northwest of Lenoir City, TN (I-40) 847
US 421 South of Wilmington, NC Michigan City, IN (US 20) 1514
US 521 Georgetown, SC (US 17) Charlotte, NC (I-485) 285
US 22Cincinnati, OH (US 27, US 42, US 52, US
127)Newark, NJ (US 1, US 9) 1048
US 222 Perryville, MD (US 40) Southwest of Allentown, PA (I-78) 175
US 322Cleveland, OH (US 6,US 20, US 42, US
Atlantic City, NJ 795
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422)
US 422
Cleveland, OH (US 6,US 20, US 42, US
322)
East ofHummelstown, PA(US 322)
Ebensburg, PA (US 219)
Southwest of Norristown, PA (US 202)439
US 522 Northwest ofPowhatan, VA (US 60) Selinsgrove, PA (US 11,US 15) 496
US 23 Jacksonville, FL (US 1, US 17) Mackinaw City, MI (I-75) 2324
US 123 West of Toccoa, GA(US 23) Greenville, SC (I-385) 121
US 223 Toledo, OH (I-280) South of Jackson, MI (US 12, US 127) 95
US 24 Minturn, CO (I-70, US 6) Pontiac, MI 2478
US 224 Huntington, IN (US 24) New Castle, PA (US 422) 462
US 25 Brunswick, GA (US 17) Ohio River (Covington, KY:US 42, US 127) 1207
US 26 South of Seaside, OR(US 101) Ogallala, NE (I-80) 2424
US 27 Miami, FL (I-195, US 1) Fort Wayne, IN (I-69) 2195
US 127 Chattanooga, TN (US 11, US 64, US 72) South of Grayling, MI (I-75) 1220
US 29 Pensacola, FL (US 90, US 98) West of Baltimore, MD (I-70) 1667
US 129 Chiefland, FL (US 19,US 27 Alt., US 98) Knoxville, TN (I-40) 937
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US 30 Astoria, OR (US 101) Atlantic City, NJ 4946
US 130Southwest of Penns Grove, NJ (I-
295, US 40)
Southwest of New Brunswick, NJ (US 1) 134
US 730 East of Boardman, OR (I-84, US 30) South of Wallula, WA (US 12) 68
US 31 Mobile, AL (US 43,US 45) Mackinaw City, MI (I-75) 2076
US 131 North of Middlebury, IN (I-80, I-90) Petoskey, MI (US 31) 436
US 231 Panama City, FL (US 98 Bus.) West of Crown Point, IN(US 41) 1468
US 331 East of Destin, FL(US 98) Montgomery, AL (US 80,US 82) 243
US 431 Dothan, AL (US 231) Owensboro, KY (US 60) 895
US 33 Richmond, VA Elkhart, IN (US 20) 1131
US 34 Granby, CO (US 40) Southwest of Chicago, IL 1806
US 35 West of Charleston, WV (US 60) Michigan City, IN (US 20) 682
US 36 West of Estes Park, CO (US 34) Uhrichsville, OH (US 250) 2276
US 136 North of Edison, NE(US 6, US 34) Veedersburg, IN (US 41) 1197
US 138 Sterling, CO (US 6) North of Big Springs, NE(US 30) 116
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US 40 US 59
Number South or west terminus North or east terminusLength
(km)
US 40 North of Park City, UT (I-80, US 189) Atlantic City, NJ 3698
US 340 Northeast of Greenville, VA (US 11) Frederick, MD (US 15, US 40) 251
US 41 Miami Beach, FL East of Copper Harbor, MI 3228
US 141 North of Green Bay, WI (I-43) South of L'Anse, MI (US 41) 283
US 341 Brunswick, GA (US 17) Barnesville, GA (US 41) 364
US 441 Miami, FL (US 27) Lake City, TN (US 25W) 1506
US 641 South of Camden, TN (I-40) Marion, KY (US 60) 212
US 42 Louisville, KY (I-65, US 60) Cleveland, OH (US 6, US 20, US 322, US 422) 571
US 43 Mobile, AL (US 31, US 45, US 90) Columbia, TN (US 31) 660
US 44 Northeast of Ellenville, NY (US 209) Plymouth, MA 383
US 45 Mobile, AL (US 31, US 43, US 90) Ontonagon, MI 2087
US 46 Columbia, NJ (I-80)Delaware River (Fort Lee, NJ: I-95,US 1, US
121
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9)
US 48East of Weston, WV (I-79, US 33, US
119)North of Strasburg, VA (I-81) 238
US 49 Gulfport, MS (US 90) Piggott, AR (US 62) 830
US 50 West of Sacramento, CA (I-80) Ocean City, MD 4846
US 150 South of Moline, IL (US 6) Mount Vernon, KY (US 25) 919
US 250 Sandusky, OH (US 6) Richmond, VA (I-95, US 60, US 360) 827
US 350 Trinidad, CO (I-25, US 85, US 87, US 160) La Junta, CO (US 50) 129
US 550 North of Albuquerque, NM (I-25,US 85) Montrose, CO (US 50) 486
US 51 West of New Orleans, LA (US 61) Hurley, WI (US 2) 2070
US 151 Northeast of Williamsburg, IA (I-80) Manitowoc, WI (US 10) 185
US 52 Canada (Portal, ND) Charleston, SC (US 17) 3335
US 53 La Crosse, WI (US 14, US 61) Canada (International Falls, MN) 649
US 54 Mexico (El Paso, TX) Northeast of Pittsfield, IL (I-72, US 36) 1941
US 56 Springer, NM (I-25, US 85) Kansas City, MO (US 71) 1030
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US 57 Mexico (Eagle Pass, TX) Southwest of Moore, TX (I-35) 166
US 58 Cumberland Gap, TN (US 25E) Virginia Beach, VA (US 60) 819
US 158 Mocksville, NC (US 64, US 601) South of Nags Head, NC (US 64) 558
US 258 Jacksonville, NC (US 17) Hampton, VA 349
US 59 Laredo, TX (I-35, US 83) Canada 3075
US 159 Nortonville, KS (US 59) Southeast of Mound City, MO (US 59) 137
US 259 Nacogdoches, TX (US 59) South of Heavener, OK (US 59, US 270) 402
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US 60 US 79
NumberSouth or west
terminus
North or east terminusLength
(km)
US 60 East of Quartzsite, AZ (I-10) Virginia Beach, VA 4297
US 160 West of Tuba City, AZ (US 89) Southwest of Poplar Bluff, MO (US 67) 2356
US 360 Danville, VA (US 58 Bus.) East of Warsaw, VA 359
US 460 Frankfort, KY (US 60, US 421) Norfolk, VA (US 60) 1054
US 61 New Orleans, LA (US 90) Wyoming, MN (I-35) 2253
US 62 Mexico (El Paso, TX) Canada (Niagara Falls, NY) 3618
US 63 Ruston, LA (I-20, US 167) Southwest of Ashland, WI (US 2) 1909
US 163 Kayenta, AZ (US 160)East of Green River, UT (I-70, US 6,US 50, US
191)323
US 64 Teec Nos Pos, AZ (US 160) South of Nags Head, NC (US 158) 3743
US 264 Raleigh, NC (I-440, US 64) Southwest of Nags Head, NC (US 64) 352
US 65 Clayton, LA (US 425) Albert Lea, MN (I-35, I-90) 1559
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US 165 Iowa, LA (US 90) Northeast of Little Rock, AR (US 70) 663
US 166 South Haven, KS (US 81) Southwest of Joplin, MO (I-44) 267
US 266 Henryetta, OK (US 62, US 75) Warner, OK (US 64) 68
US 67 Mexico (Presidio, TX) Sabula, IA (US 52) 2511
US 167 Abbeville, LA Ash Flat, AR (US 62, US 412) 803
US 68 Reidland, KY (US 62) Findlay, OH (I-75) 901
US 69 Port Arthur, TX Albert Lea, MN 1828
US 169 Tulsa, OK (US 64) Virginia, MN (US 53) 1569
US 70 Globe, AZ (US 60) Atlantic, NC 3838
US 270 Liberal, KS (US 54, US 83) Northwest of Pine Bluff, AR (I-530,US 65) 1035
US 71 West of Krotz Springs, LA(US 190) Canada (International Falls, MN) 2466
US 171 Lake Charles, LA (US 90) Shreveport, LA (US 79, US 80) 288
US 271 Tyler, TX Fort Smith, AR (US 71 Bus.) 481
US 371 Southwest of Coushatta, LA(I-49) De Queen, AR (US 59, US 70, US 71) 396
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US 72 Memphis, TN (US 64, US 70,US 79) Chattanooga, TN (US 11, US 41, US 64, US 127) 695
US 73 West of Kansas City, KS(US 24, US 40) North of Dawson, NE (US 75) 180
US 74 Chattanooga, TN (I-24, I-75) Wrightsville Beach, NC 843
US 75 Dallas, TX (I-30, I-45, US 67) Canada (Noyes, Minnesota) 1994
US 175 Jacksonville, TX (US 69) Dallas, TX 183
US 275 West of Rock Port, MO (US 136) O'Neill, NE (US 20, US 281) 428
US 76Chattanooga, TN (US 11, US 64, US
72)Wrightsville Beach, NC 880
US 176 Hendersonville, NC (US 25 Bus.) Goose Creek, SC (US 52) 369
US 276 North of Waynesville, NC (I-40) Mauldin, SC (I-385) 174
US 77 Mexico (Brownsville, TX) Sioux City, IA (I-29) 1796
US 177 Madill, OK (US 70) South Haven, KS (US 81) 375
US 277 Carrizo Springs, TX (US 83) Newcastle, OK (I-44, US 62) 1019
US 377 Del Rio, TX (US 90, US 277) Madill, OK (US 70) 769
US 78 Memphis, TN (US 64, US 70,US 79) Charleston, SC (US 17) 1151
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US 178 Northwest of Summerville, SC (US 78) Rosman, NC (US 64) 381
US 278 Wickes, AR (US 59, US 71) Hilton Head Island, SC 1733
US 378 Washington, GA (US 78) Conway, SC (US 701) 377
US 79 Austin, TX (I-35, US 290) Russellville, KY (US 68) 1405
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US 80 US 99
Number South or west terminus North or east terminusLength
(km)
US 80 Dallas, TX (I-30) Tybee Island, GA 1661
US 180 Grand Canyon National Park, AZ East of Weatherford, TX (I-20) 1814
US 280 Birmingham, AL (I-20,I-59, US 31) Northwest of Savannah, GA (US 80) 631
US 380 San Antonio, NM (I-25, US 85) Greenville, TX (I-30, US 67, US 69) 1083
US 81 North of Fort Worth, TX (I-35W, US 287) Canada (Pembina, ND) 1986
US 181 Corpus Christi, TX (I-37) San Antonio, TX (I-35, US 281) 240
US 281 Brownsville, TX (Bus. US 77, TX 48) Canada 3013
US 82 Las Cruces, NM (US 70) Southwest of Brunswick, GA (I-95, US 17) 2704
US 83 Mexico (Brownsville, TX) Canada 3048
US 183 Refugio, TX (US 77) West of Presho, SD (I-90, US 83) 1666
US 283 Brady, TX (US 87, US 190, US 377) Lexington, NE (US 30) 1175
US 84 Pagosa Springs, CO(US 160) Southeast of Midway, GA (I-95) 3088
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US 85 Mexico (El Paso, TX) Canada 2380
US 285 Sanderson, TX (US 90) Denver, CO (I-25, US 87) 1344
US 385 Big Bend National Park, TX Deadwood, SD (US 85) 1941
US 87 Port Lavaca, TX West of Havre, MT (US 2) 3215
US 287Port Arthur, TX
Yellowstone National Park, MT
Yellowstone National Park, WY
Choteau, MT (US 89)3043
US 89Flagstaff, AZ (US 180)
Yellowstone National Park, MT
Yellowstone National Park, WY
Canada2007
US 189 Provo, UT (I-15) Jackson, WY (US 26, US 89, US 187, US 191) 518
US 90 Van Horn, TX (I-10) Jacksonville Beach, FL 2628
US 190 West of Iraan, TX (I-10) Southeast of Slidell, LA (US 90) 1408
US 290 Southeast of Junction, TX (I-10) Northwest of Houston, TX (I-610) 444
US 91 Brigham City, UT (I-15, I-84) Southwest of Idaho Falls, ID (US 26) 262
US 191
Mexico (Douglas, AZ)
Yellowstone National Park, MT
Yellowstone National Park, WY
Canada 2667
US 491 Gallup, NM (I-40) Monticello, UT (US 163, US 191) 319
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US 92 St. Petersburg, FL Daytona Beach, FL 285
US 192 Southeast ofClermont, FL (US 27) Indialantic, FL 121
US 93 Wickenburg, AZ (US 60) Eureka, MT Canada (BC 93) 2166
US 95 Mexico (San Luis, AZ) Eastport, ID Canada (BC 95) 2533
US 195 North of Lewiston, ID(US 95) Spokane, WA (I-90, US 2, US 395) 153
US 395 Southwest ofVictorville, CA (I-15) South of Christina Lake, BC,Canada (BC 395) 2100
US 96 Port Arthur, TX Tenaha, TX (US 59, US 84) 274
US 97 Weed, CA (I-5) Osoyoos, BC, Canada (BC 97) 1067
US 197 Southwest of Shaniko, OR (US 97) North of Dallesport, WA (SR 14) 103
US 98 Natchez, MS (US 61,US 84, US 425) West Palm Beach, FL (US 1) 1511
US 199 Crescent City, CA (US 101) Grants Pass, OR (I-5) 129