Highways in the United States

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There are three systems of major highways in the United States of America: The Interstate Highway System, the United States Numbered Highway System (also known as U.S. Routes or U.S. Highways), and State Highways/Routes/Roads.

Note that the lengths shown in the tables below are not to scale; the game is set in two different scales – a 'regular' scale (1:20) and a 'city' scale (1:3).

Lengths marked by a dagger (†) do not cover the full route and need to be updated.

Interstate Highways[]

The Interstate Highway System is a network of controlled-access highways in the United States, which mean they don't have intersections, traffic signals, or access to property. They are written in the format Interstate X (I-X).

Main Interstates[]

Untitled (2) — An example of an Interstate Highway in American Truck Simulator

There is a number system for the main Interstates. Interstate Highways going west-east have even numbers and are numbered south to north (e.g. Interstate 10 is in the southern United States and Interstate 90 is in the northern United States). Interstate Highways going south-north have odd numbers and are numbered west to east (e.g. Interstate 5 is in the western US and Interstate 55 is east of that).

The main Interstate Highways featured in American Truck Simulator are:

Number	Length (mi)	Length (km)	Southern or western terminus	Northern or eastern terminus	Added	Notes
IS2			US 83 west of McAllen, Texas	I-69E in Harlingen, Texas	Texas expansion	Serves one state: TX
IS5	1,404†	2,261†	San Diego, California	Bellingham, Washington	Base game	Serves three states: CA, OR, WA Associated routes: I-105, I-205, I-405 (OR), I-405 (WA)
IS8	334	538	I-5 in San Diego, California	I-10 in Arizona	Base game	Serves two states: CA, AZ
IS10	724†	1,165†	I-5 in Los Angeles, California	Beaumont, Texas	Base game	Serves four states: CA, AZ, NM, TX
IS11	17	28	US 93 in Nevada	I-515, US 93, and US 95 in Las Vegas, Nevada	Arizona expansion	Serves one state: NV
IS14			US 190 east of Lampasas, Texas	I-35 in Belton, Texas	Texas expansion	Serves one state: TX
IS15	927†	1,492†	I-8 in San Diego, California	US 2 in Shelby, Montana	Base game	Serves six states: CA, NV, AZ, UT, ID, MT Associated routes: I-115, I-515
IS17	155	249	Phoenix, Arizona	I-40 in Flagstaff, Arizona	Arizona expansion	Serves one state: AZ
IS19	56	90	Nogales, Arizona	I-10 in Tucson, Arizona	Arizona expansion	Serves one state: AZ
IS20			I-10 east of Van Horn, Texas	US 59 in Marshall, Texas	Texas expansion	Serves one state: TX
IS25	1,062	1,709	I-10 and US 180 in Las Cruces, New Mexico	I-90 and US 87 in Buffalo, Wyoming	New Mexico expansion	Serves three states: NM, CO, WY
IS27			Lubbock, Texas	I-40, US 60, US 87, and US 287 in Amarillo, Texas	Texas expansion	Serves one state: TX
IS30			I-20 west of Fort Worth, Texas	I-369 in Texarkana, Texas	Texas expansion	Serves one state: TX
IS35			US 83 in Laredo, Texas	I-70 and US 24 in Kansas City, Missouri	Texas expansion	Serves four states: TX, OK, KS, MO Associated routes: I-35E, I-35W
IS37			US 181 in Corpus Christi, Texas	I-35 in San Antonio, Texas	Texas expansion	Serves one state: TX
IS40	825†	1,327†	I-15 in Barstow, California	US 59 in Sallisaw, Oklahoma	Base game	Serves five states: CA, AZ, NM, TX, OK
IS44			US 277 and US 287 in Wichita Falls, Texas	US 59, US 60 and US 69 northeast of Claremore, Oklahoma	Texas expansion	Serves two states: TX, OK
IS45			SH 87 in Galveston, Texas	I-30 in Dallas, Texas	Texas expansion	Serves one state: TX
IS69			US 59 southwest of Houston, Texas	US 59 northeast of Houston, Texas	Texas expansion	Serves one state: TX Associated routes: I-69E, I-69W
IS70	711†	1,144†	I-15 in Utah	I-35 in Kansas City, Missouri	Utah expansion	Serves four states: UT, CO, KS, MO
IS76	184	296	I-70, US 6, and US 40 in Denver, Colorado	US 385 in Julesburg, Colorado	Colorado expansion	Serves one state: CO
IS80	790†	1,271†	San Francisco, California	I-180 and US 85 in Cheyenne, Wyoming	Base game	Serves four states: CA, NV, UT, WY Associated routes: I-180, I-580 (CA), I-580 (NV)
IS82	122	196	I-90 and US 97 in Ellensburg, Washington	I-84, US 30, and US 395 in Oregon	Washington expansion	Serves two states: WA, OR Associated routes: I-182
IS84	713	1,147	I-5 and US 30 in Portland, Oregon	I-80 and US 189 in Utah	Oregon expansion	Serves three states: OR, ID, UT
IS86	61	99	I-84 and US 30 in Idaho	I-15 in Pocatello, Idaho	Idaho expansion	Serves one state: ID
IS90	319†	513†	I-5 in Seattle, Washington	US 14 and US 16 in Moorcroft, Wyoming	Washington expansion	Serves four states: WA, ID, MT, WY
IS94			I-90, US 87, and US 212 in Billings, Montana	Glendive, Montana	Montana expansion	Serves one state: MT

Auxiliary Interstates[]

Several auxillary Interstates are also featured in American Truck Simulator, which are numbered with a number in front of the originating Interstate. Odd means that it's a spur and even means that it loops back.

Number	Length (mi)	Length (km)	Southern or western terminus	Northern or eastern terminus	Added	Notes
IS105	25	40	OR 99 and OR 126 in Eugene, Oregon	I-5 and OR 126 in Springfield, Oregon	Oregon expansion	Serves one state: OR
IS115	7	11	I-15 and I-90 in Butte, Montana	Butte, Montana	Montana expansion	Serves one state: MT
IS135			I-35 in Wichita, Kansas	I-70 and US 40 in Salina, Kansas	Kansas expansion	Serves one state: KS
IS180	1	2	I-80 and US 85 in Cheyenne, Wyoming	US 30 and US 85 in Cheyenne, Wyoming	Wyoming expansion	Serves one state: WY
IS182	22	36	I-82 and US 12 in Washington	US 12, US 395, and SR 397 in Pasco, Washington	Washington expansion	Serves one state: WA
IS205	17	27	I-84 and US 30 in Portland, Oregon	SR 14 in Vancouver, Washington	Oregon expansion	Serves two states: OR, WA
IS235			I-35, I-40, US 62 and US 77 in Oklahoma City, Oklahoma	I-35, I-40, US 62 and US 77 in Oklahoma City, Oklahoma	Oklahoma expansion	Serves one state: OK
IS244			I-44 and US 75 in Tulsa, Oklahoma	I-44 and US 412 in Tulsa, Oklahoma	Oklahoma expansion	Serves one state: OK
IS335			I-35 in Emporia, Kansas	I-470 in Topeka, Kansas	Kansas expansion	Serves one state: KS
IS369			US 59, SH 93 and Loop 151 in Texarkana, Texas	I-30, US 59 and US 67 in Texarkana, Texas	Texas expansion v1.48	Serves one state: TX
IS405	44	70	I-5 in Portland, Oregon	I-5 and US 30 in Portland, Oregon	Oregon expansion	Serves one state: OR
IS405	21	33	I-5 and SR 518 in Seattle, Washington	I-90 in Bellevue, Washington	Washington expansion	Serves one state: WA
IS470			I-70 and US 40 in Topeka, Kansas	I-70 and US 40 in Topeka, Kansas	Kansas expansion	Serves one state: KS
IS515	23	37	I-11, US 93, and US 95 in Las Vegas, Nevada	I-15, US 93, and US 95 in Las Vegas, Nevada	Base game v1.38	Serves one state: NV
IS580	118†	189†	US 101 in San Rafael, California	I-5 in California	Base game	Serves one state: CA
IS580	78	125	US 395 in Carson City, Nevada	I-80 and US 395 in Reno, Nevada	Base game	Serves one state: NV
IS635			US 69 in Kansas City, Kansas	Kansas City, Kansas	Kansas expansion	Serves one state: KS

Suffixed Interstates[]

Several suffixed Interstates are also featured in American Truck Simulator, which are numbered with a letter suffix at the end of the originating Interstate. Most of them usually split the main Interstate into two distinct highways running parallel to each other, connecting at least two cities with the same number of the originating Interstate.

Number	Southern or western terminus	Northern or eastern terminus	Added	Notes
IS35E	I-35 and I-35W in Hillsboro, Texas	I-35 and I-35W in Denton, Texas	Texas expansion	Serves one state: TX
IS35W	I-35 and I-35E in Hillsboro, Texas	I-35 and I-35E in Denton, Texas	Texas expansion	Serves one state: TX
IS69E	SH 4 in Brownsville, Texas; US 77 west of Corpus Christi, Texas	US 77 north of Brownsville, Texas; I-37 in Corpus Christi, Texas	Texas expansion	Serves one state: TX
IS69W	FM 1472 in Laredo, Texas	US 59 in Laredo, Texas	Texas expansion	Serves one state: TX

Business Interstates[]

Some Interstates also have business loops. They are short roads that connect the Interstate exits with other major highways and the central parts of a city. They are written in the format Business Loop X or Interstate X Business and are abbreviated I-X BL.

Number	Length (mi)	Length (km)	Southern or western terminus	Northern or eastern terminus	Added	Notes
BU10			I-10 in San Simon, Arizona	I-10 in San Simon, Arizona	Arizona expansion	Serves one state: AZ
BU15			I-15 and SR-130 in Cedar City, Utah	I-15 and SR-130 in Cedar City, Utah	Utah expansion	Serves one state: UT
BU15			I-15, US 30, and US 91 in Pocatello, Idaho	US 30 and US 91 in Pocatello, Idaho	Idaho expansion	Serves one state: ID
BU15			US 26 in Idaho Falls, Idaho	I-15 and US 20 in Idaho Falls, Idaho	Idaho expansion	Serves one state: ID
BU25	18	29	I-25 in Socorro, New Mexico	I-25 and US 60 in Socorro, New Mexico	New Mexico expansion	Serves one state: NM
BU25	10	16	I-25 in Raton, New Mexico	I-25 in Raton, New Mexico	New Mexico expansion	Serves one state: NM
BU25			I-25 and US 87 in Cheyenne, Wyoming	I-180, US 30, and US 85 in Cheyenne, Wyoming	Wyoming expansion	Serves one state: WY
BU25			I-25, US 20, US 26, and US 87 in Douglas, Wyoming	WYO 59 and WYO 94 in Douglas, Wyoming	Wyoming expansion	Serves one state: WY
BU25			Casper, Wyoming	I-25, US 20, US 26, and US 87 in Casper, Wyoming	Wyoming expansion	Serves one state: WY
BU40	8	13	I-40 in Arizona	SR 66 in Seligman, Arizona	Arizona expansion	Serves one state: AZ
BU40	1	1	I-17 and I-40 in Flagstaff, Arizona	I-40 and US 180 in Flagstaff, Arizona	Arizona expansion	Serves one state: AZ
BU40	8	13	Gallup, New Mexico	I-40 in Gallup, New Mexico	New Mexico expansion	Serves one state: NM
BU40	24	38	I-40 and US 84 in Santa Rosa, New Mexico	I-40, US 54, and US 84 in Santa Rosa, New Mexico	New Mexico expansion	Serves one state: NM
BU40	5	8	Tucumcari, New Mexico	I-40 in Tucumcari, New Mexico	New Mexico expansion	Serves one state: NM
BU70			I-70, US 6, and US 50 in Grand Junction, Colorado	US 50 in Grand Junction, Colorado	Colorado expansion	Serves one state: CO
BU70			I-70, US 40 and US 287 in Limon, Colorado	I-70, US 24, US 40 and US 287 in Colorado	Colorado expansion	Serves one state: CO
BU70			I-70 and US 385 in Burlington, Colorado	US 24 and US 385 in Burlington, Colorado	Colorado expansion	Serves one state: CO
BU76			Sterling, Colorado	I-76 and US 6 in Sterling, Colorado	Colorado expansion	Serves one state: CO
BU80			I-80 and US 50 in Sacramento, California	SR 16 in Sacramento, California	Base game v1.44	Serves one state: CA
BU80			I-80 and US 189 in Evanston, Wyoming	I-80 and US 189 in Evanston, Wyoming	Wyoming expansion	Serves one state: WY
BU80			I-80 and US 191 in Rock Springs, Wyoming	Rock Springs, Wyoming	Wyoming expansion	Serves one state: WY
BU80			I-80 and US 30 in Rawlins, Wyoming	I-80, US 30, and WYO 76 in Rawlins, Wyoming	Wyoming expansion	Serves one state: WY
BU80			I-80 in Laramie, Wyoming	I-80 and US 30 in Laramie, Wyoming	Wyoming expansion	Serves one state: WY
BU80			WYO 222 in Cheyenne, Wyoming	I-180, US 30, and US 85 in Cheyenne, Wyoming	Wyoming expansion	Serves one state: WY
BU84			SH-55 in Nampa, Idaho	I-84 and US 30 in Nampa, Idaho	Idaho expansion	Serves one state: ID
BU84			SH-51 in Mountain Home, Idaho	SH-51 in Mountain Home, Idaho	Idaho expansion	Serves one state: ID
BU90			I-90, US 14, US 87, and WYO 338 in Sheridan, Wyoming	I-90, US 14, and US 87 in Sheridan, Wyoming	Wyoming expansion	Serves one state: WY
BU90			I-90 and WYO 50 in Gillette, Wyoming	I-90, US 14, US 16, and WYO 51 in Gillette, Wyoming	Wyoming expansion	Serves one state: WY
BU90			US 14 and US 16 in Moorcroft, Wyoming	I-90 in Moorcroft, Wyoming	Wyoming expansion	Serves one state: WY

US Highways[]

The US Highway System is an integrated network of roads and highways numbered within a nationwide grid in the contiguous United States. Unlike Interstate Highways, US Highways are generally smaller roads that contain grade-level intersections, traffic signals, and access to property. However, many have controlled-access sections, either along part of or the entirety of their route. They are written in the format U.S. Route XX (US XX).

Main US Highways[]

US 84 Santa Fe — An example of an US Highway in American Truck Simulator

The numbering system for US Highways is the opposite of that for the Interstates. East-west routes have even numbers and are numbered north to south. North-south routes have odd numbers and are numbered east to west.

The main US Highways featured in American Truck Simulator are:

Number	Length (mi)	Length (km)	Southern or western terminus	Northern or eastern terminus	Added	Notes
US2	297†	478†	I-5 and SR 529 in Everett, Washington	Culbertson, Montana	Washington expansion	Serves three states: WA, ID, MT
US6			US 395 in Bishop, California	Sterling, Colorado	Base game	Serves four states: CA, NV, UT, CO
US12	232†	373†	US 101 in Aberdeen, Washington	I-94 in Montana	Washington expansion	Serves three states: WA, ID, Montana
US14			US 16, US 20, US 89, US 191, and US 287 in Yellowstone National Park, Wyoming	Devils Tower, Wyoming	Wyoming expansion	Serves one state: WY
US16			US 14, US 20, US 89, US 191, and US 287 in Yellowstone National Park, Wyoming	US 14 in Moorcroft, Wyoming	Wyoming expansion	Serves one state: WY
US18			I-25, US 20, US 26, and US 87 in Orin, Wyoming	US 20 in Orin, Wyoming	Wyoming expansion	Serves one state: WY
US20			US 101 in Newport, Oregon	US 18 in Orin, Wyoming	Oregon expansion	Serves four states: OR, ID, MT, WY
US24			I-70 and US 6 in Colorado	US 385 in Burlington, Colorado	Colorado expansion	Serves one state: CO
US26			US 395 in Mount Vernon, Oregon	Dwyer Junction, Wyoming	Oregon expansion	Serves three states: OR, ID, WY
US30			US 101 in Astoria, Oregon	I-180 and US 85 in Cheyenne, Wyoming	Oregon expansion	Serves three states: OR, ID, WY
US34			US 40 in Colorado	US 385 in Wray, Colorado	Colorado expansion	Serves one state: CO
US40			I-80 and US 189 in Silver Summit, Utah	US 385 in Cheyenne Wells	Utah expansion	Serves two states: UT, CO
US50			I-80 in Sacramento, California	US 385 in Granada, Colorado	Base game	Serves four states: CA, NV, UT, CO
US54	199†	321†	Alamogordo, New Mexico	Tucumcari, New Mexico	New Mexico expansion	Serves one state: NM
US60			US 93 in Wickenburg, Arizona	US 70 and US 84 in Clovis, New Mexico	Arizona expansion	Serves two states: AZ, NM
US62	52	85	US 180 and US 285 in Carlsbad, New Mexico	US 180 in Hobbs, New Mexico	New Mexico expansion	Serves one state: NM
US64	389	626	US 160 in Teec Nos Pos, Arizona	US 87 in Raton, New Mexico	New Mexico expansion	Serves two states: AZ, NM
US70	424†	684†	US 60 and SR 77 in Globe, Arizona	US 60 and US 84 in Clovis, New Mexico	New Mexico expansion	Serves two states: AZ, NM
US82	177	285	US 54 and US 70 in Alamogordo, New Mexico	NM 18 in Hobbs, New Mexico	New Mexico expansion	Serves one state: NM
US84	245	394	US 160 in Pagosa Springs, Colorado	US 60 and US 70 in Clovis, New Mexico	New Mexico expansion	Serves two states: CO, NM
US85			WYO 212 in Cheyenne, Wyoming	I-180 and US 30 in Cheyenne, Wyoming	Wyoming expansion	Serves one state: WY
US87			US 64 in Raton, New Mexico	US 2 in Havre, Montana	Wyoming expansion	Serves three states: NM, WY, MT
US89			US 180 in Flagstaff, Arizona	St. Mary, Montana	Arizona expansion	Serves five states: AZ, UT, ID, WY, MT
US91			I-15 and I-84 in Brigham City, Utah	US 30 in Pocatello, Idaho	Utah expansion	Serves two states: UT, ID
US93	1,018†	1,638†	US 60 in Wickenburg, Arizona	US 2 in Kalispell, Montana	Base game	Serves four states: NV, AZ, ID, MT
US95	753		Yuma, Arizona	US 2 in Threemile Corner, Idaho	Base game	Serves five states: AZ, CA, NV, OR, ID
US97	593	954	I-5 in Weed, California	SR 20 in Tonasket, Washington	Oregon expansion	Serves three states: CA, OR, WA
US101	1,480†	2,382†	I-5 in Los Angeles, California	I-5 in Olympia, Washington	Base game	Serves three states: CA, OR, WA
US160			US 89 in Arizona	I-25 and US 350 in Trinidad, Colorado	Arizona expansion	Serves three states: AZ, NM, CO
US163			US 160 in Kayenta, Arizona	US 191 in Bluff, Utah	Utah expansion	Serves two states: AZ, UT
US180			SR 64 in Grand Canyon Village, Arizona	US 62 in Hobbs, New Mexico	Arizona expansion	Serves two states: AZ, NM
US189			SR-52 in Provo, Utah	US 26, US 89, and US 191 in Jackson, Wyoming	Utah expansion	Serves two states: UT, WY
US191			US 70 in Arizona	US 2 in Malta, Montana	Arizona expansion	Serves four states: AZ, UT, WY, MT
US197			US 97 in Oregon	I-84 and US 30 in The Dalles, Oregon	Oregon expansion	Serves one state: OR
US199	135	218	US 101 in Crescent City, California	I-5 in Grants Pass, Oregon	Oregon expansion	Serves two states: CA, OR
US212			US 310 in Rockvale, Montana	MT 59 in Montana	Montana expansion	Serves one state: MT
US285	295	475	US 62 and US 180 in Carlsbad, New Mexico	I-25 and SH 30 in Colorado	New Mexico expansion	Serves two states: NM, CO
US287			US 50 and US 385 in Lamar, Colorado	I-15 in Helena, Montana	Colorado expansion	Serves three states: CO, WY, MT
US310			US 14, US 16, US 20, and WYO 789 in Wyoming	I-90 and US 212 in Laurel, Montana	Montana expansion	Serves two states: WY, MT
US350			I-25 and US 160 in Trinidad, Colorado	US 50 in La Junta, Colorado	Colorado expansion	Serves one state: CO
US380	154	248	I-25 in New Mexico	US 70 and US 285 in Roswell, New Mexico	New Mexico expansion	Serves one state: NM
US385			US 50 and US 287 in Lamar, Colorado	I-76 in Julesburg, Colorado	Colorado expansion	Serves one state: CO
US395	1,172	1,886	SR 14 and SR 58 in California	SR 20 in Barney's Junction, Washington	Base game	Serves four states: CA, NV, OR, WA
US491	86	138	I-40 in Gallup, New Mexico	US 191 in Monticello, Utah	New Mexico expansion	Serves three states: NM, CO, UT
US550	145	234	I-25 in Albuquerque, New Mexico	US 50 in Montrose, Colorado	New Mexico expansion v1.32	Serves two states: NM, CO

Special US Routes[]

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Some US Highways have separate routes correlated with their number, which serve to provide an alternate route to the main "parent" route. Each type of special route possesses generally defined characteristics and has a defined relationship with its parent route.

Business Routes[]

These are by far the most common special route of the US Highway System. Business routes connect the parent route to the city center, while the parent route goes around. These routes are generally signed using a "Bus" or "Business" plate above the parent route's shield. They are written in the format US XX Business (US XX Bus.).

Southern or western terminus	Northern or eastern terminus	Added	Notes
US 6 / US 191 & UT-55 in Price, Utah	US 6 / US 191 & UT-55 in Price, Utah	Utah expansion	Serves one state: UT
I-90 / US 14 / US 87 & WYO 338 in Sheridan, Wyoming	I-90 / US 14 / US 87 in Sheridan, Wyoming	Wyoming expansion	Serves one state: WY
US 20 / US 26 in Casper, Wyoming	I-25 / US 20 / US 26 in Casper, Wyoming	Wyoming expansion	Serves one state: WY
US 20 / US 26 in Casper, Wyoming	I-25 / US 20 / US 26 in Casper, Wyoming	Wyoming expansion	Serves one state: WY
I-80 / US 30 in Rock Springs, Wyoming	Elk Street in Rock Springs, Wyoming	Wyoming expansion	Serves one state: WY
I-80 / US 30 / WYO 789 in Rawlins, Wyoming	I-80 / US 30 / US 287 in Rawlins, Wyoming	Wyoming expansion	Serves one state: WY
US 64 in Farmington, New Mexico	US 64 in Farmington, New Mexico	New Mexico expansion	Serves one state: NM
I-25 / US 87 & WYO 22 in Cheyenne, Wyoming	I-80 BL / US 30 & US 85 / I-180 in Cheyenne, Wyoming	Wyoming expansion	Serves one state: WY
Deepgrove timber harvest site in Astoria, Oregon	US 101 in Astoria, Oregon	Oregon expansion	Serves one state: OR
I-80 / US 189 in Evanston, Wyoming	I-80 / US 189 in Evanston, Wyoming	Wyoming expansion	Serves one state: WY
I-580 / US 50 / US 395 in Carson City, Nevada	I-580 / US 50 / US 395 in Carson City, Nevada	Base game v1.32	Serves one state: NV

Bypasses[]

Bypasses do the exact opposite of business routes; they bypass a city center when a parent route goes into it. These routes are often labelled using a "By-Pass" plate above the parent route's shield. They are written in the format US XX Bypass or US XX By-Pass and are abbreviated US XX Byp..

Shield	Length (mi)	Length (km)	Southern or western terminus	Northern or eastern terminus	Added	Notes
USBYP287			I-80 BL / US 287 / US 30 Bus. in Rawlins, Wyoming	US 287 / WYO 789 in Rawlins, Wyoming	Wyoming expansion	Serves one state: WY

Alternate Routes[]

Alt us 93 shield — Alternate Route shield (Alt. plate)

Us 89A shield — Alternate Route shield ("A" Suffix)

Alternate routes are roads that follow a different alignment to the parent route, but still take a generally parallel alignment. These routes are often labelled using an "Alternate" or "Alt." plate above the shield for the parent route, or by displaying an "A" suffix after the parent route's number on the shield. They are written in the format US XX Alternate (US XX Alt.).

Shield	Length (mi)	Length (km)	Southern or western terminus	Northern or eastern terminus	Added	Notes
USALT14			US 14, US 16, US 20, and WYO 120 in Cody, Wyoming	US 14 in Burgess Junction, Wyoming	Montana expansion	Serves one state: WY
US89A	22	35	SR 389 in Fredonia, Arizona	US 89 in Kanab, Utah	Utah expansion	Serves two states: AZ, UT Technically an auxiliary route, not an alternate route
USALT93			US 93 in Lages Station, Nevada	I-80 and US 93 in Wells, Nevada	Utah expansion	Serves one state: NV

State Highways[]

States in the US also have their own highway systems:

State	Highway designation	Format
Arizona	Arizona State Routes	State Route X (SR X)
California	California State Highways	State Route X (SR X)
Colorado	Colorado State Highways	State Highway X (SH X)
Idaho	Idaho State Highways	State Highway X (SH-X)
Kansas	Kansas State Highways	K-X (K-X)
Montana	Montana State Highways	Montana Highway X (MT X)
Nebraska	Nebraska State Highways	Nebraska Highway X (N-X)
Nevada	Nevada State Routes	State Route X (SR X)
New Mexico	New Mexico State Roads	State Road X (NM X)
Oklahoma	Oklahoma State Highways	State Highway X (SH-X)
Oregon	Oregon State Highways	Oregon Route X (OR X)
Texas	Texas State Highways	State Highway X (SH X)
Utah	Utah State Routes	State Route X (SR-X)
Washington	Washington State Routes	State Route X (SR X)
Wyoming	Wyoming State Highways	Wyoming Highway X (WYO X)

Secondary Highways[]

Some states include a secondary highway system to supplement the main one:

State	Highway designation	Format
Montana	Montana Secondary Highways	Secondary Highway X (S-X)
Texas	Texas State Highway Loops	Loop X
Texas	Texas State Highway Spurs	Spur X
Texas	Texas Farm to Market Roads	Farm to Market Road X (FM X)