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List of Interstate Highways in Idaho

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This is an old revision of this page, as edited by SounderBruce (talk | contribs) at 01:29, 23 July 2018 (fixing I-180N). The present address (URL) is a permanent link to this revision, which may differ significantly from the current revision.

Interstate Highways of the Idaho State Highway System

Interstate 15 marker

Interstate 184 marker

Interstate 90 Business marker

Typical Interstate highway markers
System information
Maintained by ITD
Highway names
InterstatesInterstate n (I-n)
US HighwaysU.S. Highway n (US-n)
System links
  • Idaho State Highway System

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.

Mainline highways

Number Length (mi)[1] 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

Number Length (mi)[1] Length (km) Southern or western terminus Northern or eastern terminus Formed Removed Notes
I-15 BL 4.338 6.981 Serves McCammon
I-15 BL 1.000 1.609 Serves Inkom
I-15 BL 5.560 8.948 Serves Pocatello
I-15 BL 4.802 7.728 Serves Blackfoot
I-15 BL 7.230 11.636 Serves Idaho Falls
I-84 BL 12.557 20.209 Serves Caldwell and Nampa
I-84 BL 5.985 9.632 Serves Mountain Home
I-84 BL Serves Hammett
I-84 BL 1.425 2.293 Serves Glenns Ferry
I-84 BL 3.518 5.662 Serves Bliss
I-84 BL Serves Jerome
I-84 BL 6.56 10.56 Serves Burley
I-86 BL 6.475 10.421 01972-01-011972 current Serves American Falls
I-90 BL 5.640 9.077 Serves Post Falls
I-90 BL 3.834 6.170 Served Coeur d'Alene
I-90 BL 3.966 6.383 Serves Osburn
I-90 BL Serves Silverton
I-90 BL 1.243 2.000 Serves Wallace
I-90 BL 1.000 1.609 Serves Mullan
  •       Former

See also

References

  1. ^ a b "Milepoint Logs". Idaho Transportation Department. Retrieved February 15, 2017.

External links