Interstate 15 in Utah

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Interstate 15
Main route of the Interstate Highway System
Veterans Memorial Highway[1]
Defined by Utah Code §72-4-107, maintained by UDOT
Length: 400.592 mi[2] (644.690 km)
South end: I-15 at Arizona state line near St. George
Major
junctions:		 I-70 near Cove Fort
I-215 in Murray
I-80 in Salt Lake City
I-215 in North Salt Lake
I-84 in Ogden and in Tremonton
North end: I-15 at Idaho state line near Malad
State Routes in Utah
< SR-14 SR-16 >

In the U.S. state of Utah, Interstate 15 runs north-south through the capital of Salt Lake City. It is the primary north-south highway in Utah. The majority of the state's population lives along its corridor. The only Metropolitan Statistical Area in Utah not connected via I-15 is the Logan Utah-Idaho Metropolitan Statistical Area.

Contents

[edit] Route description

Extinct volcano cone near Fillmore, Utah off I-15.
Extinct volcano cone near Fillmore, Utah off I-15.
Major cities
Bolded cities are officially-designated control cities for signs

I-15 passes through the fast-growing Dixie region, which includes St. George, Cedar City, and eventually most of the major cities and suburbs along the Wasatch Front, including Provo, Orem, Sandy, West Jordan, Salt Lake City, Layton, and Ogden. Around Cove Fort, Interstate 70 begins its journey eastward across the country. The interstate merges with I-80 for about 3 miles (5 km) from South Salt Lake to just west of Downtown Salt Lake City and also merges with Interstate 84 from Ogden to Tremonton. Along nearly its entire length through the state, I-15 winds its way along the western edge of a nearly continuous range of mountains (the Wasatch Range in the northern half of the state). The only exceptions are when it passes through the mountains south of Cedar City and again north of Cove Fort.

[edit] History

Legislative designation for I-15, until 1977.
Legislative designation for I-15, until 1977.
Main article: U.S. Route 91

The southwest-north alignment followed by I-15 was a major transportation corridor in the early 20th century, followed by auto trails such as the Arrowhead Trail (south from Salt Lake City), Evergreen National Highway (entire length), and Banff-Grand Canyon Road (north from Nephi). In 1926, when the numbered system of U.S. highways was created, this route was signed U.S. Route 91[3]

The route of I-15 from St. George to Brigham City was built along the corridor of what was U.S. Route 91 from 1926-1974.[3] In 1974 I-15 was reasonably intact and US-91 was deleted, with the unfinished segments signed as Temporary I-15. The route north of Brigham City was built along the corridor of an old route of U.S. Route 191. This highway was also deleted once I-15 was reasonably intact. However, a different route in Utah was re-designated US-191 in 1982. [4]

Prior to 1977 the route of I-15 (and US-91 before) was also designated State Route 1 by the state of Utah, but no portion of the route was signed with this number.

[edit] Exit list


County Location Mile[2] # Destinations Notes
Old[5]
Washington St. George 4.641 4 Brigham Road
6.311 6 SR-18 / I-15 Bus. north (Bluff Street)
8.662 8 I-15 Bus. south (St. George Boulevard, SR-34) to SR-18 – St. George, Santa Clara
Washington 10.901 10 Washington City (SR-212)
13.378 13 Washington Parkway
15.908 16 SR-9 – Hurricane, Zion National Park
Leeds 22.579 22 Leeds, Silver Reef (SR-228) Northbound exit and southbound entrance
23.703 23 Leeds, Silver Reef (SR-228) Southbound exit and northbound entrance
Toquerville 27.470 27 SR-17 – Toquerville, Hurricane
30.682 30 Browse
31.861 31 Pintura
33.435 33 Ranch exit
36.763 36 Ranch exit
40.253 40 Kolob Canyons (Zion National Park)
42.159 42 New Harmony, Kanarraville Former SR-58
Iron 51.149 51 Hamilton Fort, Kanarraville Former SR-58
Cedar City 56.804 57 I-15 Bus. north (SR-130) to SR-14 – Cedar City
58.837 59 SR-56 – Cedar City
62.497 62 SR-130 (I-15 Bus. south) – Cedar City, Enoch, Minersville
70.263 71 Summit, Enoch Former SR-38
Parowan 75.205 75 I-15 Bus. north / SR-143 – Parowan
77.801 78 I-15 Bus. south (SR-274) to SR-143 – Parowan, Paragonah
82.253 82 SR-271 – Paragonah
94.453 95 SR-20 to US-89 – Panguitch, Kanab, Circleville
99.690 100 Ranch exit
Beaver 108.745 109 I-15 Bus. north (SR-160) to SR-21 – Beaver, Milford
Beaver 111.780 112 I-15 Bus. south (SR-160) to SR-21 – Beaver, Milford, Manderfield
120.126 120 Manderfield
125 Ranch exit Closed
129.443 129 Sulphurdale
Millard 132.183 132 I-70 east – Richfield, Denver
134.875 135 Historic Cove Fort (SR-161)
138.073 138 Ranch exit
146.493 146 Kanosh Former SR-133
Meadow 158.265 158 SR-133 – Meadow, Kanosh
Fillmore 163.370 163 I-15 Bus. north (SR-99) – Fillmore
166.723 167 I-15 Bus. south (SR-99) – Fillmore
173.507 174 To US-50 west (via SR-64) – Holden, Delta
178.330 178 US-50 west – Holden, Delta South end of US-50 overlap
183.638 184 Ranch exit
188.439 188 US-50 east – Scipio North end of US-50 overlap
Juab 202.189 202 Yuba Lake
206.553 207 Mills, Levan (SR-78)
Nephi 222.812 222 I-15 Bus. north / SR-28 to I-70 – Nephi, Salina, Richfield
225.266 225 SR-132 – Nephi, Manti
228.091 228 I-15 Bus. south (SR-28) – Nephi, Delta
233.161 236 233 SR-54 – Mona
Utah Santaquin 242.447 245 242 South Santaquin
244.809 248 244 US-6 west – Santaquin, Delta South end of US-6 overlap
Payson 248.845 252 248 Payson, Salem (SR-178)
250.923 254 250 SR-115 – Payson, Benjamin
253.557 256 253 SR-164 – Spanish Fork, Benjamin
Spanish Fork 257.264 260 257 SR-156 – Spanish Fork
257.636 261 258 US-6 east to US-89 – Price, Manti North end of US-6 overlap; northbound exit is via exit 257
Springville 259.976 263 260 SR-77 – Springville
261.821 265 261 SR-75 – Springville, Provo
Provo 263.373 266 263 US-189 north (University Avenue) / 1860 South
265.589 268 265 SR-114 (Center Street) – Provo, Provo Municipal Airport Signed as exits 265A (east) and 265B (west) northbound
Orem 269.072 272 269 SR-265 (University Parkway)
270.660 274 271 Center Street – Orem
271.670 275 272 SR-52 (800 North) to US-189
Lindon 272.767 276 273 1600 North (SR-241) – Lindon
Pleasant Grove 275.328 278 275 Pleasant Grove, Lindon
American Fork 276.501 279 276 500 East (SR-180) – American Fork, Pleasant Grove
278.586 281 278 Main Street (SR-145) – American Fork
Lehi 279.701 282 279 SR-73 west (Main Street) – Lehi
282.311 285 282 US-89 south / 1200 West – Lehi South end of US-89 overlap
283.985 287 284 SR-92 – Highland, Alpine
Salt Lake Draper 288.272 291 288 SR-140 (14600 South)
289.832 293 289 SR-154 (Bangerter Highway)
291.358 294 291 SR-71 (12300 South, US-89 north) North end of US-89 overlap
Sandy 293.634 297 293 SR-151 (10600 South)
295.616 298 295 SR-209 (9000 South)
Midvale 297.920 301 297 SR-48 (7200 South)
Murray 299.005 302 298 I-215 (Belt Route)
300.300 303 300 SR-173 (5300 South)
301.653 304 301 SR-266 (4500 South)
South Salt Lake 303.414 306 303 SR-171 (3300 South)
304.691 307 304 I-80 east – Cheyenne South end of I-80 overlap
305.231 308A 305A SR-201 west – West Valley
305.198 308B 305B 2100 South (SR-201)
Salt Lake City 306.315 309A 305C 1300 South
306.607 309B 305D 900 South (SR-270) Northbound exit and southbound entrance
307.500 310 306 600 South (SR-269) Northbound exit and southbound entrance
307.740 310 307 400 South Northbound exit and southbound entrance are HOV-only
308.079 311 308 I-80 west – Salt Lake International Airport, Reno North end of I-80 overlap
309.333 312 309 600 North (SR-268)
310.239 313 310 900 West No northbound exit
311.792 314 311 2300 North
311.947 315 312 US-89 south (Beck Street) Southbound exit and northbound entrance
Davis North Salt Lake 313.128 315 312 US-89 north Northbound exit and southbound entrance
313.275 316 313 I-215 south (Belt Route) – Salt Lake Airport Southbound exit and northbound entrance
314.301 317 314 Center Street Southbound exit only
315.243 318 315 2600 South (SR-93)
Bountiful 316.870 320 316 SR-68 (500 South)
West Bountiful 317.557 321 317 400 North (SR-106) Northbound exit and southbound entrance
318.024 321 317 US-89 south South end of US-89 overlap; southbound exit and northbound entrance
Centerville 319.512 322 319 Centerville (SR-105)
Farmington 322.916 325 322 SR-227 / Lagoon Drive – Farmington Northbound exit and southbound entrance
326 324 US-89 north to I-84 east – Ogden North end of US-89 overlap; northbound exit and southbound entrance
Legacy Parkway Under construction; southbound exit and northbound entrance
324.448 327 325 SR-225 / Lagoon Drive – Farmington Northbound exit is via exit 324
Kaysville 328.640 331 328 SR-273 – Kaysville
Layton 330.019 332 330 I-15 Bus. north / SR-126 – Layton Northbound exit and southbound entrance
331.589 334 331 SR-232 (Hill Field Road) – Layton
332.883 335 332 SR-108 – Syracuse
Clearfield 334.066 336 334 SR-193 – Clearfield, West Point
335.800 338 335 SR-103 (650 North)
Weber Roy 338.447 341 338 SR-97 (5600 South) – Roy
Riverdale 339.133 342 339 SR-26 – Riverdale Northbound exit and southbound entrance
340.227 343 340 I-84 east – Riverdale, Cheyenne South end of I-84 overlap; northbound exit is via exit 339
Ogden 341.948 344 341 SR-79 (31st Street)
343.067 345 342 SR-53 (24th Street) Northbound exit and southbound entrance
West Haven 343.852 346 343 SR-104 (21st Street, Wilson Lane) – Ogden City Center
Marriott-Slaterville 344.968 347 344 SR-39
346.726 349 346 Harrisville
Farr West 349.361 352 349 SR-134 – Farr West, Pleasant View, North Ogden
Box Elder 351.853 354 351 SR-126 to US-89 – Willard, Pleasant View
Willard 357.554 360 357 SR-315 – Willard, Perry
358.566 361 Port of Entry
360.542 363 Rest Area Northbound exit and entrance
362.020 364 362 US-91 (1100 South Street, I-15 Bus. north, I-84 Bus. west) to US-89
Brigham City 363.738 366 363 Forest Street
365.508 368 365 SR-13 (900 North Street, I-15 Bus. south, I-84 Bus. east)
Honeyville 372.734 375 372 SR-240 to SR-13 – Honeyville, Bear River
Tremonton 376.532 379 376 SR-13 (I-15 Bus. north, I-84 Bus. west) – Tremonton, Garland, Bear River
379.334 382 379 I-84 west (SR-30 west) – Tremonton, Boise North end of I-84 overlap; south end of SR-30 overlap
Tremonton 381.037 383 381 I-15 Bus. south – Tremonton, Garland
385.266 387 385 SR-30 east – Riverside, Logan North end of SR-30 overlap
392.387 394 392 SR-13 south – Plymouth
398.817 402 398 Portage Former SR-90

[edit] References

  1. ^ Utah Code Section 72-4-201. State of Utah. Retrieved on 2008-01-12.
  2. ^ a b Utah Department of Transportation, Highway Reference Information, accessed May 2008
  3. ^ a b Rand McNally Auto Road Atlas, 1926, accessed via the Broer Map Library
  4. ^ Utah Highways by Dan Stober (personal website, last accessed 08-08-2007)
  5. ^ Utah Department of Transportation, Milepost Project


Interstate 15
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