Interstate 15

"I-15" redirects here. For other roads numbered I-15, see I-15 (disambiguation).

Interstate 15
Game	American Truck Simulator: Base game Utah Idaho Montana
State	California, Nevada, Arizona, Utah, Idaho, Montana
Length	? mi (? km)
Speed Limit	55–80 mph (89–129 km/h)
Route
	0 mi IS8 I-8 in San Diego
	CA 0–311 mi (0–501 km) IS10IS40 I-10, I-40 CA58 SR 58
	NV 311–401 mi (501–645 km) IS515 I-515 US93US95 US 93, US 95
	UT 437–798 mi (703–1,285 km) IS70IS80IS84 I-70, I-80, I-84 US6US50 US 6, US 50 UT9UT26UT30 UT34UT52UT130UT151UT161UT201 SR-9, SR-26, SR-30, SR-34, SR-52, SR-130, SR-151, SR-161, SR-201
	ID 798–? mi (1,285–? km) IS86 I-86 US20US30US91 US 20, US 30, US 91 ID33 SH-33
	MT ?-? mi (?-? km) IS90IS115 I-90, I-115 US12US89US287 US 12, US 89, US 287 MT200 MT 200
	? mi (? km) US2 US 2 in Shelby

Interstate 15 (I-15) is a north–south Interstate Highway in southern California and Nevada, northwestern Arizona, central Utah, eastern Idaho, and western Montana in American Truck Simulator. It runs from Interstate 8 in San Diego to US 2 in Shelby.

Course

Interstate 15 in ATS begins at its junction with Interstate 8 just east of San Diego, and immediately climbs over the Peninsular Ranges to Interstate 10, the highway in this segment being six lanes wide. North of I-10, the highway continues climbing, this time over the Transverse Ranges, reaching its climax at Cajon Summit, which has an elevation of 4260 ft. This grade is rather steep, and features a slow vehicle lane for northbound traffic. North of the summit, the highway reaches CA 58 and Barstow, which offers services off the highway to the south of town. After leaving Barstow, the highway meets with Interstate 40 at its western terminus, passes the town of Baker (notable for having the world's tallest thermometer, which is visible from the road), and sets off through the desolate Mojave Desert in the south of the Great Basin.

Right after crossing into Nevada, the highway passes through the border town of Primm, and soon after moves through Las Vegas, where it intersects with US 95 and 93, the latter having a brief concurrency. Leaving Las Vegas, I-15 soon crosses into Arizona, where it runs a short but scenic stretch through the Virgin River Gorge. Leaving the gorge, the highway enters the Colorado Plateau and the state of Utah.

After crossing the state line, travelers are greeted by north and southbound Weigh Stations (which feature Rest Stops) before passing through the city of St. George. North of town, UT-9 is reached, and soon after the highway exits the Colorado Plateau, re-entering the Great Basin. It is here that the highway passes through Cedar City, and proceeds along the edge of the Colorado Plateau, which stands prominently to the east of the highway in the form of high, tree-covered plateaus. After traversing a summit, I-15 intersects with Interstate 70 at its western terminus at Cove Fort, the fort itself being accessible from the highway. After another summit, the highway encounters US 50 and the town of Scipio, and proceeds through the desert alongside the Wasatch Mountains. It soon passes Provo, and shortly afterward reaches Salt Lake City and Interstate 80, followed quickly by Ogden and Interstate 84, which begins a short concurrency. North of Ogden are north and southbound weigh stations, and further north is Brigham City, which offers travel services and access to Logan via US 89 and 91. At Tremonton, where there are more services, I-84 breaks away to the northwest while I-15 continues its northern trend into Idaho.

Soon after entering Idaho, the highway crosses the Bannock Range via Malad Summit (5574 ft) and descends into McCammon and Inkom, where notable cliffs rise over the road. After north and southbound weigh stations, Pocatello is reached, and with it, Interstate 86. The highway proceeds through the Snake River Plain and across a rather large lava field, which features north and southbound Rest Stops. Shortly afterwards the city of Idaho Falls is reached, where the highway crosses paths with US 20 and US 26. North of Idaho Falls is the Sage Junction Port of Entry, a weigh station with a rest area, and from there the highway continues to Montana.

I-15 enters Montana via Monida Pass, where the highway crosses the Great Continental Divide between the Centennial Mountains to the east and the Beaverhead Mountains to the west; at 6870 feet (2094 m), this is the highest point of I-15. Descending from the moutains, the highway passes the town of Lima, which features a rest area, and runs through the valley of the Red Rock, between the Tendoys (a subrange of the Beaverheads) to the west and the Blacktails to the east. The highway then skirts the eastern shore of the Clark Canyon Reservoir, and proceeds along the Beaverhead River to the towns of Barretts and Dillon; the former has a truck stop and a Coastline Mining depot. North of Dillon, the highway crosses the Great Divide a second time via Deer Lodge Pass (5879 ft/1792 m), between the Anaconda Range to the west and the Highland Mountains to the east. The highway then passes the Port of Montana, an outlying industrial park of Butte, and shortly after runs along a short concurrency with I-90 to Butte proper, which is accessible by the spur route I-115. I-15 separates from I-90 at the feet of the Boulder Mountains, and proceeds to climb along the east side of Butte up Elk Park Pass (6352 ft/1936 m), where the highway crosses the Great Divide a third time, making I-15 notable for crossing the Divide more times than any other Interstate Highway. After weaving through the Boulder Mountains, the highway passes through Montana's capital city of Helena, and proceeds through Helena Valley, where the iconic Sleeping Giant mountain formation is clearly visible. I-15 then runs along the Missouri River through the Adel Mountains, where the river has carved a rather scenic canyon; in this gorge are the towns Craig and Mid Canon, as well as north and southbound rest areas. Leaving the Missouri River Canyon, the highway passes the city of Great Falls, where it meets US 87 and MT 200. Past Great Falls, the 15 runs across vast, open plains in the shadow of the distant Sawtooth range to the west. There the highway passes the town of Conrad, which has a weigh station and services, and currently ends at the town of Shelby, where the highway intersects with US 2. From Shelby it's a short distance further to the Canadian border.

Cities

California

• San Diego
• Los Angeles
• Barstow

Scenery towns

• Ontario
• Baker

Nevada

• Primm
• Las Vegas

Utah

• St. George
• Cedar City
• Provo
• Salt Lake City
• Ogden

Scenery towns

• Washington
• Scipio
• Spanish Fork
• Orem
• Sandy
• Roy
• Brigham City
• Tremonton
• Riverside

Idaho

• Pocatello
• Idaho Falls

Scenery towns

• McCammon
• Sage Junction

Montana

• Butte
• Helena
• Great Falls

Scenery towns

• Lima
• Dillon
• Rocker
• Craig
• Mid Canon
• Conrad
• Shelby

Exit list

California

Location	mi	Exit	Destinations	Facilities	Notes
San Diego	0	6	IS8 I-8 – San Diego, El Centro		South terminus in game
	100	109 A-B	IS10 I-10 – Los Angeles, Phoenix
Barstow	151	175	Outlet Center Drive
	157	178	Lenwood Road
	166	179	CA58 CA 58 West – Bakersfield
	175	181	L Street / West Main Street
	185	183	Barstow
	197	184	IS40 I-40 East – Kingman, Flagstaff
	256	----	Rest area

Nevada

Location	mi	Exit	Destinations	Facilities	Notes
Primm	312	1	Primm
Las Vegas	328–340	35	Russell Road
	344–356	38 A–B	Flamingo Road		Northbound exit 38
	357	42 A–B	IS515US93US95 I-515 South / US 93 South / US 95 – Phoenix, Downtown Las Vegas, Reno, Rancho Drive		Southbound exit 42; South end of US 93 concurrency; I-515 and US 95 exits 76 A–B
	373	46	Cheyenne Avenue
	379	64	US93 US 93 North – Ely		North terminus in base game North end of US 93 concurrency

Arizona

Location	mi	Exit	Destinations	Facilities	Notes
No exits in Arizona

Utah

Location	mi	Exit	Destinations	Facilities	Notes
	445	----	Weigh station
St. George	453	4	Brigham Road
	456	8	UT34 SR-34 West (St. George Boulevard)
Washington	465	16	UT9 SR-9 East – Hurricane
Cedar City	497	57	BU15UT130 I-15 Bus. (South Main) / SR-130 to SR-14
	503	62	BU15UT130 I-15 Bus. (North Main) / SR-130 to SR-14
	536	132	IS70 I-70 East – Salina, Denver
	556	135	Historic Cove Fort
	597	172	US50 US 50 West – Delta
Scipio	609	188	US50 US 50 East – Scipio
Provo	664	257 A	Main Street		Southbound only; inaccessible
	668	257 B	US6 US 6 East – Spanish Fork, Price
	687	272	UT52US189 SR-52 (800 North) to US 189
Salt Lake City	707	293	UT151 SR-151 West (10600 South)
	717	304	IS80 I-80 East – Cheyenne		South end of I-80 concurrency
	720	305 A–D	UT201 SR-201 West / 1300 South / 2100 South – West Valley		Northbound only; inaccessible
	728	308	IS80 I-80 West – Reno, Salt Lake City International Airport		North end of I-80 concurrency
Ogden	747	339	UT26IS84 SR-26 (Riverdale Road) to I-84 East		Northbound exit and southbound entrance
	748	340	IS84 I-84 East – Cheyenne		South end of I-84 concurrency; southbound exit and northbound entrance
	750	----	Weigh station
Brigham City	755	362	US91US89 US 91 (1100 South) to US 89
Tremonton	775	379	IS84 I-84 West – Tremonton, Boise		North end of I-84 concurrency; eastbound I-84 exit 41
Riverside	784	385	UT30 SR-30 East – Riverside, Logan		North terminus in Utah DLC

Idaho

Location	mi	Exit	Destinations	Facilities	Notes
	804	----	Rest area		Northbound only
	823	----	Rest area		Southbound only
McCammon	839	47	US30 US 30 East – McCammon, Montpelier		South terminus in Idaho DLC South end of US 30 concurrency
	855	----	Weigh station
Pocatello	869	67	BU15US30US91 I-15 BL North / US 30 West / US 91 North (5th Avenue)		North end of US 30 concurrency
	888	72	IS86 I-86 West – Twin Falls, Boise		I-86 exits 63 A–B
	905	----	Rest area
Idaho Falls	923	113	Shelley
	925	118	BU15US20 I-15 BL South / US 20 West / US 20 Bus. East – Idaho Falls Historic Downtown, Arco		South end of US 20 concurrency
	927	119	US20 US 20 East – Rexburg, West Yellowstone		North terminus in game North end of US 20 concurrency

Montana

TBA

Business Routes

Interstate 15 Business Loop shield

Cities

Interstate 15 has business routes in 3 cities:

• Cedar City
• Pocatello
• Idaho Falls

Utah

There is one business route in Utah:

Cedar City

I-15 BL - Cedar City, UT

Interstate 15 Business is a business loop in Cedar City. It runs from exit 57 of I-15 north along SR-130 where it runs through the city east of I-15 until reaching exit 62.

Idaho

There are two business routes in Idaho:

Pocatello

I-15 Bus. - Pocatello, ID

Interstate 15 Business in Pocatello begins at its junction with Interstate 15, US 30, and US 91. The route follows the entirety of US 91 through the city and ends at US 30 (East Gould Street).

Idaho Falls

I-15 Bus. - Idaho Falls, ID

Interstate 15 Business in Idaho Falls begins at its junction with Interstate 15 and US 20. It follows West Broadway Street from I-15 to US 30 (Yellowstone Avenue), and then follows US 30 to the south until it terminates with West Sunnyside Road.

History

18 Wheels of Steel

• The highway first appeared in SCS Software's first trucking game, Hard Truck: 18 Wheels of Steel, where it connected the cities of Los Angeles and Las Vegas on the West Coast map, as well as Salt Lake City and Helena on the Rockies map.

• Interstate 15 can also be found in several later 18 Wheels of Steel games: In Across America it connects Interstate 40 with Salt Lake City and Great Falls and in Pedal to the Metal, Convoy, Haulin' and American Long Haul it also passes Las Vegas.

American Truck Simulator

• In the initial version of American Truck Simulator, Interstate 15 began at a trumpet interchange with Interstate 10 east of Los Angeles and headed north to Las Vegas. The small town currently on SR 58 west of Barstow near which a Coastline Mining quarry exists was situated on Interstate 15.

• In update 1.5, as part of the 1:35 to 1:20 map rescale, several new sections were added to the existing route to accommodate the new map scale, including the truck stop south of Barstow and its accompanying exits, as well as the rest area between Barstow and Primm. The small town west of Barstow was moved to its current location, and the junction with SR 58 was changed from an at-grade three-way junction to the current trumpet interchange.

• In update 1.29, the section of Interstate 15 from Los Angeles to San Diego was added, along with the current four-level stack interchange with Interstate 10 and the cloverstack interchange with Interstate 8.

• In the initial version of the Utah map expansion DLC, the section of Interstate 15 from US 93 in Las Vegas to Interstate 84 and US 91 in Brigham City was added.

• In update 1.38, the section of Interstate 15 from Interstate 84 and US 91 in Brigham City to SR-30 in Riverside was added. In Las Vegas, all interchanges were rebuilt. The diamond interchanges with Russell Road and Flamingo Road were changed to be reached via local lanes, and the former was rebuilt and the latter changed to a partial folded diamond interchange. The frontage road running parallel between the exits was removed. The trumpet interchange with US 95 was changed to a "Spaghetti Bowl" interchange with US 93 and US 95. The diamond interchange with US 93 on Cheyenne Avenue was separated into a single-point diamond interchange with the previous section of US 93 on Cheyenne Avenue and a diverging diamond interchange with US 93.

• In the initial version of the Idaho map expansion DLC, the section of Interstate 15 from SR-30 in Riverside to US 20 in Idaho Falls was added.

• In the initial version of the Montana map expansion DLC, the section of Interstate 15 from US 20 in Idaho Falls to US 2 in Shelby was added.

See also

• Information about Interstate 15 in real life

Arizona
Cities	Camp Verde - Clifton - Ehrenberg - Flagstaff - Grand Canyon Village - Holbrook - Kayenta - Kingman - Nogales - Page - Phoenix - San Simon - Show Low - Sierra Vista - Tucson - Yuma List of scenery towns in Arizona
Highways	Interstate 8 - Interstate 10 (Business routes) - Interstate 15 - Interstate 17 - Interstate 19 - Interstate 40 (Business routes) US 60 - US 64 - US 70 - US 89 - US 89A - US 93 - US 95 - US 160 - US 163 - US 180 - US 191 SR 51 - SR 61 - SR 64 - SR 66 - SR 77 - SR 85 - SR 89 - SR 90 - SR 92 - SR 98 - SR 260 - SR 303 - SR 389
See also	List of landmarks in Arizona - List of Truck Stops in Arizona

Utah
Cities	Cedar City - Logan - Moab - Ogden (Roy) - Price - Provo (Mapleton, Orem, Spanish Fork) - Salina - Salt Lake City (Garfield, Herriman, Sandy, West Valley City) - St. George - Vernal List of scenery towns in Utah
Highways	Interstate 15 - Interstate 70 - Interstate 80 - Interstate 84 US 6 - US 40 - US 50 - US 89 - US 89A - US 91 - US 163 - US 189 - US 191 - US 491 SR-9 - SR-10 - SR-26 - SR-30 - SR-34 - SR-52 - SR-55 - SR-56 - SR-59 - SR-130 - SR-151 - SR-161 - SR-165 - SR-172 - SR-201 - SR-202 - SR-265
See also	List of landmarks in Utah - List of Truck Stops in Utah

Montana
Cities	Billings (Lockwood) - Bozeman (Four Corners) - Butte (Rocker, Silver Bow) - Glasgow - Glendive - Great Falls - Havre (Havre North, West Havre) - Helena - Kalispell (Columbia Falls, Evergreen) - Laurel - Lewistown - Miles City - Missoula (Bonner-West Riverside, Wye) - Sidney - Thompson Falls List of scenery towns in Montana
Highways	Interstate 15 - Interstate 90 - Interstate 94 - Interstate 115 US 2 - US 12 - US 20 - US 87 - US 89 - US 93 - US 191 - US 212 - US 287 - US 310 MT 3 - MT 16 - MT 19 - MT 23 - MT 24 - MT 47 - MT 56 - MT 59 - MT 84 - MT 85 - MT 135 - MT 200 - MT 200S S-205 - S-232 - S-243 - S-426 - S-474
See also	List of landmarks in Montana - List of Truck Stops in Montana