There are 23 U.S. Highways that exist entirely or partially in the U.S. state of South Carolina. In South Carolina, all U.S. Highways are maintained by the South Carolina Department of Transportation (SCDOT).

Mainline highways

Number Length (mi) Length (km) Southern or western terminus Northern or eastern terminus Formed Removed Notes
US 1 170.540 274.458 US 1 / US 25 / US 78 / US 278 / SR 10 / SR 121 / SC 121 at the Georgia state line south of North Augusta US 1 at the North Carolina state line near Wallace 01926-01-011926 current Travels north-south along the sandhills region; connecting the cities of North Augusta, Aiken, Columbia, and Camden. South of Camden, it parallels with I-20.
US 15 158.832 255.615 US 17 Alt. in Walterboro US 15 / US 401 in North Carolina state line at McColl 01935-01-011935 current Travels north-south, connecting the cities of Walterboro, Sumter, and Bennettsville.
US 17 221.454 356.396 US 17 / SR 404 Spur at the Georgia state line near Limehouse US 17 at the North Carolina state line near Little River 01927-01-011927 current Travels north-south along the coastal plain area, connecting the cities of Hardeeville, Charleston, Georgetown, and Myrtle Beach.
US 21 245.480 395.062 Hunting Island State Park I-77 / US 21 at the North Carolina state line near Fort Mill 01926-01-011926 current Travels north-south, connecting the cities of Beaufort, Orangeburg, Columbia, and Rock Hill. North of Columbia, it parallels with I-77.
US 25 140.600 226.274 US 1 / US 25 / US 78 / US 278 / SR 10 / SR 121 / SC 121 at the Georgia state line south of North Augusta US 25 at the North Carolina state line near Travelers Rest 01926-01-011926 current Travels north-south in the western part of the state, connecting the cities of North Augusta, Greenwood, and Greenville.
US 29 110.202 177.353 US 29 / SR 8 at the Georgia state line near Holland Store US 29 at the North Carolina state line northeast of Blacksburg 01927-01-011927 current Travels north-south in the Upstate area, parallel to I-85. It connects the cities of Anderson, Greenville, and Spartanburg.
US 52 159.960 257.431 Line Street in Charleston US 52 at the North Carolina state line near Cheraw 01980-11-251980 current Travels north-south, connecting the cities of Charleston, Lake City, Florence, and Darlington.
US 76 314.985 506.919 US 76 / SR 2 at the Georgia state line near Westminster US 76 at the North Carolina state line near Nichols 01926-01-011926 current Longest US Highway in the state, going east-west; it connects the cities Anderson, Columbia, Sumter, and Florence.
US 78 142.207 228.860 US 1 / US 25 / US 78 / US 278 / SR 10 / SR 121 / SC 121 at the Georgia state line near North Augusta Line Street in Charleston 01926-01-011926 current Travels east-west, connecting the cities of North Augusta, Aiken, Bamberg, and Charleston.
US 117 45.0 72.4 Conway US 117 at the North Carolina state line near Little River 01932-01-011932 01935-01-011935 Replaced by US 501 and US 17.
US 123 65.240 104.994 US 123 / SR 365 at the Georgia state line near Westminster I-385 Bus. in Greenville 01968-01-011968 current Travels north-south in the Upstate area, connecting the cities of Westminster and Greenville.
US 176 230.760 371.372 US 176 at the North Carolina state line near Landrum US 52 / Red Bank Road in Goose Creek 01926-01-011926 current Travels east-west, parallel to I-26. It connects the cities of Spartanburg, Union, and Columbia.
US 178 233.390 375.605 US 178 at the North Carolina state line near Rocky Bottom U.S. Route 78 in South Carolina east of Dorchester 01932-01-011932 current Travels east-west, connecting the cities of Anderson, Greenwood, and Orangeburg.
US 217 24.4 39.3 Pee Dee US 217 at the North Carolina state line near Dillon 01927-01-011927 01932-01-011932 Replaced by US 301.
US 221 126.390 203.405 US 221 / SC 150 at the Georgia state line near Clarks Hill US 221 at the North Carolina state line near Chesnee 01932-01-011932 current Travels north-south within the Piedmont area, connecting the cities of Greenwood and Spartanburg.
US 276 44.469 71.566 US 276 at the North Carolina state line near Cleveland I-185 / I-385 in Mauldin 01932-01-011932 current Shortest US Highway in the state, going east-west; it goes through the city of Greenville.
US 278 146.130 235.173 US 1 / US 25 / US 78 / US 278 / SR 10 / SR 121 / SC 121 at the Georgia state line south of North Augusta US 278 Bus. / Greenwood Drive / Pope Avenue in Hilton Head Island 01965-01-011965 current Travels east-west, connecting the cities of North Augusta and Hilton Head Island.
US 301 189.704 305.299 US 301 / SR 73 at the Georgia state line near Allendale I-95 / US 301 / US 501 at the North Carolina state line near Dillon 01932-01-011932 current Travels north-south, loosely parallel to I-95. It connects the cities of Orangeburg, Florence, and Dillon.
US 321 217.550 350.113 US 17 in Hardeeville US 321 at the North Carolina state line near Clover 01930-01-011930 current Travels north-south, connecting the cities of Hardeeville, Columbia, and York.
US 378 210.310 338.461 US 378 / SR 43 at the Georgia state line near McCormick US 501 Bus. in Conway 01952-01-011952 current Travels east-west, connecting the cities of Columbia, Sumter, and Conway.
US 401 77.760 125.143 US 76 Bus. in Sumter US 401 at the North Carolina state line near McColl 01957-01-011957 current Travels north-south, connecting the cities of Sumter, Darlington, and Bennettsville.
US 501 73.770 118.721 US 17 Bus. in Myrtle Beach I-95 / US 301 / US 501 at the North Carolina state line near Dillon 01935-01-011935 current Travels north-south through the Grand Strand area, connecting the cities of Myrtle Beach, Conway, and Dillon.
US 521 172.820 278.127 US 17 in Georgetown US 521 at the North Carolina state line at Indian Land 01932-01-011932 current Travels north-south, connecting the cities of Georgetown, Sumter, Camden, and Lexington.
US 601 183.370 295.105 US 321 in Tarboro US 601 at the North Carolina state line at Pageland 01927-01-011927 current Travels north-south,connecting the cities of Bamberg, Orangeburg, Camden, and Pageland.
US 701 61.670 99.248 US 17 / US 17 Alt. in Georgetown US 701 at the North Carolina state line near Loris 01932-01-011932 current Travels north-south through the Grand Strand area, connecting the cities of Georgetown and Conway.
  •       Former

Special routes

This list is incomplete; you can help by adding missing items. (February 2017)
Number Length (mi) Length (km) Southern or western terminus Northern or eastern terminus Formed Removed Notes

US 1 Truck
8.440 13.583 US 1 / US 78 / US 78 Truck / SC 19 Truck / SC 118 in Aiken US 78 / US 78 Truck / SC 4 Truck / SC 302 east of Aiken

US 1 Conn.
0.230 0.370 US 1 / SC 6 in Lexington SC 6 in Lexington Unsigned; southbound only; completely concurrent with the eastbound lanes of SC 6

US 1 Conn.
0.080 0.129 SC 16 in Columbia US 1 in Columbia Unsigned

US 1 Truck
1.540 2.478 US 521 / US 521 Truck / SC 34 Truck in Camden US 1 / US 521 Truck / SC 34 / SC 34 Truck in Camden

US 1 Truck
3.230 5.198 US 1 / US 52 / US 52 Truck south of Cheraw US 1 / US 52 / US 52 Truck / SC 9 / SC 9 Truck in Cheraw Completely concurrent with US 52 Truck

US 15 Alt.
Walterboro North Carolina state line near McColl 01937-01-011937 01946-01-011946 The entire route was in concurrency with US 15 in South Carolina.

US 15 Conn.
2.140 3.444 US 15 / US 301 southwest of Santee SC 6 in Santee Unsigned

US 15 Conn.
2.140 3.444 US 301 in Summerton US 15 in Summerton Unsigned

US 15 Alt.
Sumter Society Hill 01955-01-011955 01957-01-011957 Replaced by US 401.

US 15 Conn.
0.340 0.547 US 15 on the SumterSouth Sumter line US 521 on the SumterSouth Sumter line Unsigned

US 15 Bus.
6.500 10.461 US 15 south of Hartsville US 15 south of Hartsville

US 15 Bus.
US 15 west of Bennettsville US 15 east of Bennettsville 01952-01-011952 01990-01-011990 Was routed along Main Street and Tyson Avenue, in concurrency with US 401 Bus. It was replaced by SC 385.

US 17 Alt.
6.7 10.8 US 17 Alt. / SR 25 Alt. at the Georgia state line near Limehouse US 17 near Limehouse 01955-01-011955 01994-01-011994 Provided an alternate route from Savannah, via the Talmadge Memorial Bridge. Was reassigned as mainline US 17

US 17 Alt.
123.900 199.398 US 17 / US 21 northeast of Pocotaligo US 17 / US 701 in Georgetown 01952-01-011952 current Travels north–south,connecting the cities of Walterboro, Summerville, Moncks Corner, and Georgetown.

US 17 Conn.
0.270 0.435 Yemassee Highway in Yemassee US 17 Alt. / US 21 / SC 68 in Yemassee Unsigned

US 17 Alt. Truck
8.242 13.264 US 17 Alt. / SC 642 southwest of Summerville US 17 Alt. / SC 165 / Berkely Circle in Summerville

US 17 Bus.
4.2 6.8 US 17 / US 701 / US 701 Bus. northwest of Mount Pleasant US 17 / US 701 / US 701 Bus. northeast of Mount Pleasant 01967-01-011967 01992-01-011992 Was routed along Coleman Boulevard and Georgetown Highway (Chuck Dawley Boulevard); completely concurrent with US 701 Bus. It was replaced by SC 703 and BS 526.

US 17 Bus.
22.940 36.918 US 17 in Murrells Inlet US 17 in Myrtle Beach 01967-01-011967 current Connects the downtown areas of Murrells Inlet, Garden City, Surfside Beach and Myrtle Beach.

US 21 Bus.
5.400 8.690 US 21 / SC 802 in Beaufort US 21 in Burton 01967-01-011967 current Routed along Sea Island Parkway, Carteret Street and Boundary Street

US 21 Bus.
3.3 5.3 Orangeburg Orangeburg 01950-01-011950 01967-01-011967 Was routed along Broughton Street (in concurrency with US 178 Bus.) and Columbia Road

US 21 Bus.
2.730 4.394 US 21 / US 601 Truck / SC 4 in Orangeburg US 21 / US 178 / US 601 in Orangeburg 01967-01-011967 current Routed along Rowesville Road, Charleston Highway, and Magnolia Street

US 21 Conn.
2.730 4.394 US 178 Bus. in Orangeburg US 21 / US 178 in Orangeburg Unsigned

US 21 Conn.
0.850 1.368 US 21 / US 176 / US 321 in West Columbia US 1 in West Columbia Unsigned

US 21 Conn.
2.930 4.715 US 21 / US 76 Conn. / US 176 / US 321 / SC 48 Truck in Columbia US 76 / US 76 Conn. / US 378 in Columbia Unsigned; completely concurrent with the western segment of US 76 Conn.

US 21 Conn.
1.660 2.672 US 21 southeast of Ridgeway SC 34 northwest of Ridgeway Unsigned

US 21 Bus.
6.7 10.8 Rock Hill Rock Hill 01950-01-011950 02013-01-012013 Was routed along Main Street, Albright Road, Black Street, Oakland Avenue, and Cherry Road, through downtown Rock Hill. It was decommissioned at the request of Rock Hill to gain ownership and maintenance oversight.[2][3]

US 21 Bus.
7.060 11.362 SC 160 in Fort Mill US 21 north of Fort Mill 01948-01-011948 current It is routed along Spratt Street, White Street, Old Nations Road, and Springfield Parkway, through downtown Fort Mill

US 25 Bus.
2.900 4.667 US 25 Alt. / SR 4 at the Georgia state line in North Augusta US 25 in North Augusta 01961-01-011961 current Only business loop that crosses the Georgia state line

US 25 Conn.
0.550 0.885 Dead end in North Augusta US 25 / SC 121 in North Augusta Unsigned

US 25 Bus.
3.700 5.955 US 25 / US 25 Truck in Edgefield US 25 / US 25 Truck / SC 23 Truck north of Edgefield Is, in fact, US 25 signed as a business route

US 25 Truck
3.980 6.405 US 25 in Edgefield US 25 / SC 23 Truck north of Edgefield Is, in fact, a secondary road signed as a truck route

US 25 Bus.
4.840 7.789 US 25 / US 178 / US 221 in Greenwood US 25 / US 178 / SC 72 in Greenwood 01969-01-011969 current

US 25 Bus.
4.310 6.936 US 25 / SC 252 Truck southeast of Ware Shoals US 25 / SC 252 / SC 252 Truck north of Ware Shoals 01963-01-011963 current

US 25 Bus.
Greenville Greenville 01969-01-011969 01995-01-011995 Former business loop through downtown Greenville; replaced in parts by US 123, US 276, SC 20 and SC 291.

US 25 Conn.
1.100 1.770 US 276 / McElhaney Road in Travelers Rest US 25 in Travelers Rest Unsigned

US 29 Bus.
6.438 10.361 US 29 on the Homeland Park–Green Acres line US 29 in Anderson

US 29 Conn.
3.520 5.665 US 29 near Williamston SC 20 in Williamston

US 29 Alt.
US 29 in Greenville US 29 in Greenville 01938-01-011938 01948-01-011948 Was an alternate route through downtown Greenville; was downgraded to secondary roads.

US 29 Bus.
US 29 in Greenville US 29 in Greenville 01958-01-011958 01962-01-011962

US 29 Spur
0.110 0.177 US 29 in Greenvillw US 276 in Greenville Unsigned

US 29 Conn.
0.250 0.402 US 276 in Greenvillw US 29 in Greenville Unsigned

US 29 Conn.
0.120 0.193 SC 291 / Edwards Road on the GreenvilleWade Hampton line US 29 in Wade Hampton Unsigned

US 29 Conn.
0.34 0.55 US 29 in Spartanburg SC 296 in Spartanburg 02013-01-012013 02016-01-012016

US 29 Alt.
US 29 in Spartanburg US 29 in Blacksburg 01954-01-011954 01962-01-011962 Was a redesignation of mainline US 29 between Spartanburg and Blacksburg; after I-85 was established, it was reverted to US 29.

US 52 Spur
2.980 4.796 East Bay Street / Broad Street in Charleston US 52 / Mount Pleasant Street in Charleston Unsigned

US 52 Conn.
0.900 1.448 I-26 in North Charleston US 52 / US 78 in North Charleston Unsigned

US 52 Truck
4.780 7.693 US 52 / US 301 / West 3rd Loop Road in Florence US 52 in Florence

US 52 Conn.
1.070 1.722 US 52 / US 76 in Florence US 52 in Florence Unsigned

US 52 Bus.
4.508 7.255 US 52 / SC 34 Truck in Darlington US 52 / US 401 near Darlington 01974-01-011974 current

US 52 Truck
3.550 5.713 US 1 / US 1 Truck / US 52 / Manor Road south of Cheraw US 52 / SC 9 Truck in Cheraw 02002-01-012002 current

US 76 Bus.
Seneca Seneca 01958-01-011958 02000-01-012000

US 76 Bus.
3.910 6.293 US 76 / Ashley Lane in Laurens US 76 / US 221 Truck / SC 127 in Laurens 01982-01-011982 current

US 76 Bus.
Newberry Newberry 01952-01-011952 02001-01-012001

US 76 Conn.
4.440 7.145 US 21 / US 21 Conn. / US 176 / US 321 / SC 48 Truck in Columbia
SC 16 in Columbia
SC 16 in Columbia
US 21 Conn. / US 76 / US 378 in Columbia
US 76 / US 378 / SC 760 in Columbia
SC 760 in Columbia
Unsigned

US 76 Bus.
5.910 9.511 US 76 / US 378 in Sumter US 76 / US 378 in Sumter 01959-01-011959 current

US 76 Conn.
0.140 0.225 I-20 Bus. / West Evans Street in Florence US 76 in Florence Unsigned

US 78 Truck
8.440 13.583 US 1 / US 1 Truck / US 78 / SC 19 Truck / SC 118 in Aiken US 1 Truck / US 78 / SC 4 Truck / SC 302 east of Aiken Completely cocurrent with US 1 Truck

US 78 Bus.
0.530 0.853 SC 3 in Blackville US 78 in Blackville 01981-01-011981 current Inventoried by SCDOT as US 78 Conn.; signed west of SC 3, but is inventoried by SCDOT as only using these termini

US 78 Conn.
0.530 0.853 SC 3 in Blackville US 78 in Blackville Is, in fact, the official designation of the signed US 78 Bus.

US 78 Conn.
0.140 0.225 SC 61 northwest of Farrell Crossroads US 78 near Farrell Crossroads Unsigned

US 123 Bus.
Seneca Seneca 01958-01-011958 02000-01-012000 Was routed along North First Street.

US 123 Bus.
Easley Easley 01958-01-011958 01964-01-011964 Was routed along Main Street and Liberty Drive; replaced by SC 93

US 123 Conn.
0.740 1.191 SC 93 in Easley US 123 in Easley

US 123 Alt.
Greenville Greenville 01950-01-011950 01972-01-011972 Replaced by SC 124.

US 176 Alt.
US 176 in Spartanburg US 176 in Spartanburg 01938-01-011938 01948-01-011948 Traversed downtown Spartanburg, along Magnolia and Howard streets; some map inserts of the time list it as "Optional US 176"; was downgraded to secondary roads.

US 176 Conn.
0.520 0.837 US 221 in Spartanburg I-585 / US 176 / SC 9 in Spartanburg Unsigned

US 176 Conn.
0.360 0.579 US 221 in Spartanburg I-585 / US 176 / SC 9 north of Spartanburg Unsigned

US 176 Bus.
US 176 in Union US 176 in Union 01958-01-011958 01990-01-011990 Was routed along Pinckney Street and Thompson Boulevard; replaced by SC 18

US 176 Conn.
0.460 0.740 US 176 / SC 18 Truck in Union SC 18 / SC 18 Truck in Union Unsigned; completely concurrent with SC 18 Truck

US 176 Conn.
0.340 0.547 SC 72 / Douglas Street in Whitmire US 176 in Whitmire Unsigned

US 178 Conn.
0.180 0.290 US 76 / SC 28 / SC 28 Bus. in Northlake US 178 in Northlake Unsigned

US 178 Bus.
4.840 7.789 US 25 / US 25 Bus. / US 178 / US 221 in Greenwood US 25 / US 25 Bus. / US 178 / SC 72 in Greenwood 01949-01-011949 current

US 178 Conn.
0.190 0.306 US 178 / SC 39 / SC 121 in Saluda US 378 / SC 194 in Saluda Unsigned

US 178 Bus.
4.400 7.081 US 21 / US 178 in Wilkinson Heights US 178 in Orangeburg 01970-01-011970 current

US 221 Truck
5.440 8.755 US 221 / SC 127 US 76 / US 221 in Laurens

US 221 Alt.
5.360 8.626 US 221 / SC 11 in Chesnee US 221 Alt. at the North Carolina state line near State Line 01941-01-011941 current

US 221 Conn.
0.490 0.789 US 221 / SC 11 east of Chesnee US 221 east of Chesnee Unsigned

US 276 Conn.
1.100 1.770 US 25 Conn. / US 276 in Travelers Rest US 25 / US 25 Conn. in Travelers Rest Unsigned; may be decommissioned

US 276 Bus.
US 25 / US 276 in Greenville US 276 in Greenville 01947-01-01c. 1947 01970-01-011970

US 276 Bus.
US 276 in Greenville US 276 in Mauldin 01983-01-011983 01984-01-011984

US 278 Conn.
0.060 0.097 US 278 / Town Square in Ridgeland US 278 in Ridgeland Unsigned

US 278 Bus.
8.990 14.468 US 278 in Hilton Head Island US 278 / Greenwood Drive / Pope Avenue in Hilton Head Island 01998-01-011998 current

US 301 Conn.
0.410 0.660 I-95 / US 521 in Alcolu US 301 Conn. in Alcolu Unsigned

US 301 Conn.
2.470 3.975 US 301 southeast of Alcolu US 521 in Alcolu Unsigned

US 321 Bus.
4.350 7.001 US 321 / SC 34 / SC 213 southwest of Winnsboro Mills US 321 near Winnsboro 01952-01-011952 current

US 321 Bus.
3.670 5.906 US 321 / SC 9 / SC 72 / SC 97 / SC 121 southeast of Chester US 321 / SC 97 northwest of Chester 01964-01-011964 current

US 321 Bus.
2.500 4.023 US 321 in York US 321 / SC 161 Bus. in York 01958-01-011958 current

US 378 Bus.
6.6 10.6 US 76 / US 378 northwest of Sumter US 378 east of Sumter 01958-01-011958 01975-01-011975 Was routed along Broad Street, Liberty Street, and Myrtle Beach Boulevard

US 378 Bus.
4.490 7.226 US 378 / SC 341 northwest of Lake City US 378 near Lake City 01958-01-011958 current Routed along Main Street (with SC 341) and Church Street / Myrtle Beach Highway

US 378 Truck
27.328 43.980 US 378 / US 501 / US 701 in Conway US 378 / US 701 / SC 905 in Conway Routed along US 501, SC 544 Conn., US 501 Bus., SC 90, Old Reaves Ferry Road, and SC 905

US 401 Bus.
3.4 5.5 US 401 in Bennettsville US 401 in Bennettsville 01958-01-011958 01989-01-011989 Was routed along Main Street and Tyson Avenue, in concurrency with US 15 Bus. It was replaced by SC 385.

US 501 Bus.
4.600 7.403 US 501 in Red Hill US 501 / US 701 in Conway 01964-01-011964 current

US 501 Bus.
7.210 11.603 US 501 / SC 41 Alt. near Marion US 501 north of Marion 01964-01-011964 current

US 521 Bus.
3.420 5.504 US 521 southeast of Andrews US 521 / SC 41 in Andrews

US 521 Conn.
4.7 7.6 US 521 in Sumter US 15 in Sumter 02008-01-01c. 2008

US 521 Truck
3.420 5.504 US 1 Truck / US 521 in Camden US 521 / US 601 / US 601 Truck in Camden

US 521 Truck
0.830 1.336 US 1 Truck / US 521 / SC 34 Truck in Camden US 1 / US 1 Truck / SC 34 / SC 34 Truck in Camden Completely concurrent with US 1 Truck and SC 34 Truck

US 521 Bus.
1.500 2.414 US 521 / US 601 / US 601 Bus. in Kershaw US 521 north of Kershaw

US 521 Truck
0.140 0.225 US 521 / US 601 / SC 157 Truck / SC 341 Truck in Kershaw US 521 / US 601 / US 601 Bus. / SC 157 Truck / SC 341 Truck in Kershaw Completely concurrent with US 601 / SC 157 Truck / SC 341 Truck

US 521 Conn.
0.060 0.097 US 521 Bus. north of Kershaw US 521 north of Kershaw Unsigned

US 521 Bus.
3.870 6.228 US 521 northwest of Elgin US 521 / SC 9 in Lancaster 01965-01-011965 current

US 521 Byp.
US 521 northwest of Elgin US 521 / SC 9 in Lancaster

US 601 Truck
5.2 8.4 US 301 / US 601 / SC 4 in Orangeburg US 21 / US 21 Bus. / US 178 / US 601 in Orangeburg

US 601 Truck
3.980 6.405 US 1 / US 521 Truck / US 601 in Camden US 521 / US 521 Truck / US 601 in Camden

US 601 Bus.
0.760 1.223 US 521 / US 521 Bus. / US 601 in Kershaw US 521 Bus. / US 521 Truck / US 601 / SC 157 Truck / SC 341 Truck in Kershaw

US 701 Bus.
4.2 6.8 US 17 / US 17 Bus. / US 701 northwest of Mount Pleasant US 17 / US 17 Bus. / US 701 northeast of Mount Pleasant 01967-01-01c. 1967 01992-01-011992 Was routed along Coleman Boulevard and Georgetown Highway (Chuck Dawley Boulevard) in concurrency with US 17 Bus. It was replaced by SC 703 and I-526 Bus.

US 701 Truck
27.328 43.980 US 378 / US 501 / US 701 in Conway US 378 / US 701 / SC 905 in Conway Routed along US 501, SC 544 Conn., US 501 Bus., SC 90, Old Reaves Ferry Road, and SC 905

US 701 Truck
1.468 2.363 US 501 / US 501 Bus. / US 701 in Conway US 701 / Sherwood Drive in Conway Routed along US 501 and Mill Pond Road

US 701 Bus.
0.179 0.288 US 701 north of Loris US 701 Bus. at the North Carolina state line north of Loris 01960-01-011960 current Only business loop that crosses the North Carolina state line
  •       Former

See also

References

  1. ^ Bureau of Public Roads & American Association of State Highway Officials (November 11, 1926). United States System of Highways Adopted for Uniform Marking by the American Association of State Highway Officials (Map). 1:7,000,000. Washington, DC: United States Geological Survey. OCLC 32889555. Retrieved November 7, 2013 – via University of North Texas Libraries.
  2. ^ "Binder-all applications May 2013" (PDF). AASHTO. May 2013. p. 301. Archived from the original (PDF) on October 19, 2013. Retrieved July 7, 2013.
  3. ^ Special Committee on U.S. Route Numbering (May 4, 2013). "Special Committee on US Route Numbering Report to SCOH on May 3, 2013 Meeting" (PDF) (Report). Washington, DC: American Association of State Highway and Transportation Officials. p. 8. Archived (PDF) from the original on September 10, 2018. Retrieved July 7, 2013.