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List of Interstate Highways in Idaho

January 01, 1970

The Interstate Highways in Idaho are the segments of the Dwight D. Eisenhower National System of Interstate and Defense Highways owned and maintained by the Idaho Transportation Department (ITD) in the U.S. state of Idaho. The state has five Interstate Highways that total approximately 611 miles (983 km) in length.[1]

Interstate Highways of the Idaho State Highway System

Typical Interstate highway markers
Interstate Highways highlighted in red
System information
Maintained by ITD
Length611.31 mi[1] (983.81 km)
Formed1956
Highway names
InterstatesInterstate n (I-n)
US HighwaysU.S. Highway n (US-n)
StateIdaho State Highway n (SH-n)
System links
  • Idaho State Highway System

Mainline highways edit

Number Length (mi)[2] Length (km) Southern or western terminus Northern or eastern terminus Formed Removed Notes
  I-15 196.000 315.431 I-15 near Woodruff I-15 at Monida Pass 01957-01-011957 current  
  I-15W 62.850 101.147 I-84 / US 30 near Declo I-15 in Chubbuck 01957-01-011957 01978-01-011978 Became I-86
  I-80N 275.650 443.616 I-84 near Fruitland I-84 near Black Pine 01957-01-011957 01980-01-011980 Became I-84
  I-84 275.650 443.616 I-84 near Fruitland I-84 near Black Pine 01980-01-011980 current Designated as I-80N until 1980
  I-86 62.850 101.147 I-84 / US 30 near Declo I-15 in Chubbuck 01978-01-011978 current Designated as I-15W until 1978
  I-90 73.888 118.911 I-90 in State Line I-90 at Lookout Pass 01957-01-011957 current  
  I-180N 3.620 5.826 I-84 / US 30 in Boise US 20 / US 26 in Boise 01970-01-011970 01979-01-011979 Became I-184
  I-184 3.620 5.826 I-84 / US 30 in Boise US 20 / US 26 in Boise 01979-01-011979 current Designated as I-180N until 1979, completed in 1990
  •       Former

Business routes edit

Number Length (mi)[2] Length (km) Southern or western terminus Northern or eastern terminus Formed Removed Notes
  I-15 BL 4.338 6.981 I-15/US 91 exit 44 near McCammon I-15/US 30/US 91 exit 47 in McCammon — —
  I-15 BL 1.000 1.609 I-15/US 30/US 91 exit 57 in Inkom I-15/US 30/US 91 exit 58 in Inkom — —
  I-15 BL 5.560 8.948 I-15/US 30/US 91 exit 67 in Pocatello I-15 exit 69 in Pocatello — — US 30 and US 91 branches off I-15 at its southern end
  I-15 BL 4.802 7.728 I-15 exit 89 southwest of Blackfoot I-15/US 26 exit 93 in Blackfoot — — I-15 and US 26 begin concurrency at northern end
  I-15 BL 7.230 11.636 I-15/US 26 exit 116 near Idaho Falls I-15/US 20 Bus. exit 118 in Idaho Falls — — Concurrent with Us 26 at south end and US 20 Bus. at north end
  I-84 BL 12.557 20.209 I-84/US 20/US 26/US 30 exit 27 in Caldwell I-84/US 30/SH-55 exit 38 in Nampa — —
  I-84 BL — — I-84/US 30 exit 49 west of Boise I-84/US 20/US 26/US 30 exit 54 in Boise — — Now part of I-184, US 20, and US 26
  I-84 BL 5.985 9.632 I-84/US 20/US 26/US 30 exit 90 near Mountain Home I-84/US 26/US 30 exit 99 near Mountain Home — —
  I-84 BL — — I-84/US 26/US 30/SH-78 exit 112 in Hammett I-84/US 26/US 30 exit 114 near Hammett — — Runs concurrent with SH-78 at west end
  I-84 BL 1.425 2.293 I-84/US 26/US 30 exit 120 in Glenns Ferry I-84/US 26/US 30 exit 121 in Glenns Ferry — —
  I-84 BL 3.518 5.662 I-84/US 26/US 30 exit 137 near Bliss I-84/US 26 exit 141 in Bliss — — Runs concurrent with US 30 near whole length. Road continues as US 26 at east end
  I-84 BL 6.56 10.56 I-84/SH-27 exit 208 near Burley I-84/US 30/SH-24 near Heyburn — — Entirely concurrent with SH-27 at west end then US 30 to east end. Road continues as SH-24
  I-86 BL 6.475 10.421 I-86/US 30/SH-37 exit 36 near Neeley I-86/US 30/SH-39 exit 40 in American Falls 01972-01-011972 current Concurrent with SH-39 toward east end
  I-90 BL 5.640 9.077 I-90 exit 2 west of Post Falls I-90 exit 6 in Post Falls — —
  I-90 BL 3.834 6.170 I-90 exit 11 near Coeur d'Alene I-90 exit 15 in Coeur d'Alene — —
  I-90 BL 1.4 2.3 I-90 exit 49 near Kellogg I-90 exit 51 in Kellogg — —
  I-90 BS 3.966 6.383 I-90 exit 57 in Osburn E. Mullan Ave. in downtown Osburn — — Originally a business loop that ran from exit 57 to exit 60 to Silverton via Silver Valley Road. Split into two separate spurs
  I-90 BS 0.12 0.19 I-90 exit 60 in Silverton Silver Valley Rd south of Silverton — — Part of original loop that once ran from I-90 exit 57 in Osburn to exit 60 in Silverton via Silver Valley road. Split into two separate spurs
  I-90 BL 1.243 2.000 I-90 exit 61 near Wallace I-90 exit 62 in Wallace — — Originally part of I-90 that contained a traffic signal before entering Wallace. Became I-90BL when I-90 was rerouted north as a full freeway
  I-90 BL 1.000 1.609 I-90 exit 68 in Mullan I-90 exit 69 near Mullan — —
  •       Former

See also edit

References edit

  1. ^ a b "National Highway Freight Network Map and Tables for Idaho". Federal Highway Administration. 2015. Retrieved December 11, 2022.
  2. ^ a b "Milepoint Logs". Idaho Transportation Department. Retrieved February 15, 2017.

External links edit

  •   Media related to Interstate Highways in Idaho at Wikimedia Commons

January 01, 1970
list, interstate, highways, idaho, interstate, highways, idaho, segments, dwight, eisenhower, national, system, interstate, defense, highways, owned, maintained, idaho, transportation, department, state, idaho, state, five, interstate, highways, that, total, a. The Interstate Highways in Idaho are the segments of the Dwight D Eisenhower National System of Interstate and Defense Highways owned and maintained by the Idaho Transportation Department ITD in the U S state of Idaho The state has five Interstate Highways that total approximately 611 miles 983 km in length 1 Interstate Highways of the Idaho State Highway SystemTypical Interstate highway markersInterstate Highways highlighted in redSystem informationMaintained by ITDLength611 31 mi 1 983 81 km Formed1956Highway namesInterstatesInterstate n I n US HighwaysU S Highway n US n StateIdaho State Highway n SH n System linksIdaho State Highway System Interstate US State Contents 1 Mainline highways 2 Business routes 3 See also 4 References 5 External linksMainline highways editNumber Length mi 2 Length km Southern or western terminus Northern or eastern terminus Formed Removed Notes nbsp I 15 196 000 315 431 I 15 near Woodruff I 15 at Monida Pass 01957 01 01 1957 current nbsp I 15W 62 850 101 147 I 84 US 30 near Declo I 15 in Chubbuck 01957 01 01 1957 01978 01 01 1978 Became I 86 nbsp I 80N 275 650 443 616 I 84 near Fruitland I 84 near Black Pine 01957 01 01 1957 01980 01 01 1980 Became I 84 nbsp I 84 275 650 443 616 I 84 near Fruitland I 84 near Black Pine 01980 01 01 1980 current Designated as I 80N until 1980 nbsp I 86 62 850 101 147 I 84 US 30 near Declo I 15 in Chubbuck 01978 01 01 1978 current Designated as I 15W until 1978 nbsp I 90 73 888 118 911 I 90 in State Line I 90 at Lookout Pass 01957 01 01 1957 current nbsp I 180N 3 620 5 826 I 84 US 30 in Boise US 20 US 26 in Boise 01970 01 01 1970 01979 01 01 1979 Became I 184 nbsp I 184 3 620 5 826 I 84 US 30 in Boise US 20 US 26 in Boise 01979 01 01 1979 current Designated as I 180N until 1979 completed in 1990 FormerBusiness routes editNumber Length mi 2 Length km Southern or western terminus Northern or eastern terminus Formed Removed Notes nbsp I 15 BL 4 338 6 981 I 15 US 91 exit 44 near McCammon I 15 US 30 US 91 exit 47 in McCammon nbsp I 15 BL 1 000 1 609 I 15 US 30 US 91 exit 57 in Inkom I 15 US 30 US 91 exit 58 in Inkom nbsp I 15 BL 5 560 8 948 I 15 US 30 US 91 exit 67 in Pocatello I 15 exit 69 in Pocatello US 30 and US 91 branches off I 15 at its southern end nbsp I 15 BL 4 802 7 728 I 15 exit 89 southwest of Blackfoot I 15 US 26 exit 93 in Blackfoot I 15 and US 26 begin concurrency at northern end nbsp I 15 BL 7 230 11 636 I 15 US 26 exit 116 near Idaho Falls I 15 US 20 Bus exit 118 in Idaho Falls Concurrent with Us 26 at south end and US 20 Bus at north end nbsp I 84 BL 12 557 20 209 I 84 US 20 US 26 US 30 exit 27 in Caldwell I 84 US 30 SH 55 exit 38 in Nampa nbsp I 84 BL I 84 US 30 exit 49 west of Boise I 84 US 20 US 26 US 30 exit 54 in Boise Now part of I 184 US 20 and US 26 nbsp I 84 BL 5 985 9 632 I 84 US 20 US 26 US 30 exit 90 near Mountain Home I 84 US 26 US 30 exit 99 near Mountain Home nbsp I 84 BL I 84 US 26 US 30 SH 78 exit 112 in Hammett I 84 US 26 US 30 exit 114 near Hammett Runs concurrent with SH 78 at west end nbsp I 84 BL 1 425 2 293 I 84 US 26 US 30 exit 120 in Glenns Ferry I 84 US 26 US 30 exit 121 in Glenns Ferry nbsp I 84 BL 3 518 5 662 I 84 US 26 US 30 exit 137 near Bliss I 84 US 26 exit 141 in Bliss Runs concurrent with US 30 near whole length Road continues as US 26 at east end nbsp I 84 BL 6 56 10 56 I 84 SH 27 exit 208 near Burley I 84 US 30 SH 24 near Heyburn Entirely concurrent with SH 27 at west end then US 30 to east end Road continues as SH 24 nbsp I 86 BL 6 475 10 421 I 86 US 30 SH 37 exit 36 near Neeley I 86 US 30 SH 39 exit 40 in American Falls 01972 01 01 1972 current Concurrent with SH 39 toward east end nbsp I 90 BL 5 640 9 077 I 90 exit 2 west of Post Falls I 90 exit 6 in Post Falls nbsp I 90 BL 3 834 6 170 I 90 exit 11 near Coeur d Alene I 90 exit 15 in Coeur d Alene nbsp I 90 BL 1 4 2 3 I 90 exit 49 near Kellogg I 90 exit 51 in Kellogg nbsp I 90 BS 3 966 6 383 I 90 exit 57 in Osburn E Mullan Ave in downtown Osburn Originally a business loop that ran from exit 57 to exit 60 to Silverton via Silver Valley Road Split into two separate spurs nbsp I 90 BS 0 12 0 19 I 90 exit 60 in Silverton Silver Valley Rd south of Silverton Part of original loop that once ran from I 90 exit 57 in Osburn to exit 60 in Silverton via Silver Valley road Split into two separate spurs nbsp I 90 BL 1 243 2 000 I 90 exit 61 near Wallace I 90 exit 62 in Wallace Originally part of I 90 that contained a traffic signal before entering Wallace Became I 90BL when I 90 was rerouted north as a full freeway nbsp I 90 BL 1 000 1 609 I 90 exit 68 in Mullan I 90 exit 69 near Mullan FormerSee also edit nbsp U S Roads portal List of U S Highways in Idaho List of state highways in IdahoReferences edit a b National Highway Freight Network Map and Tables for Idaho Federal Highway Administration 2015 Retrieved December 11 2022 a b Milepoint Logs Idaho Transportation Department Retrieved February 15 2017 External links edit nbsp Media related to Interstate Highways in Idaho at Wikimedia Commons Retrieved from https en wikipedia org w index php title List of Interstate Highways in Idaho amp oldid 1149909584, wikipedia, wiki, book, books, library,

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