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Interstate 84 (Idaho)

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Title: Interstate 84 (Idaho)  
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Subject: List of intrastate Interstate Highways, Interstate 86 (Idaho), List of Idaho State Highways
Publisher: World Heritage Encyclopedia

Interstate 84 (Idaho)

This article is about the section of Interstate 84 in Idaho. For the entire length of the highway, see Interstate 84 (Oregon–Utah).

Interstate 84
;">Route information
Maintained by ITD
;">Major junctions
West end: I-84 at Oregon state line
  I-184 in Boise
I-86 near Declo
East end: I-84 at Utah state line
;">Highway system

State Highways in Idaho

In the U.S. state of Idaho, Interstate 84 heads southeast from the Oregon state line. It spurs to Interstate 184 in Boise. Eventually, I-84 spurs Interstate 86, and mainline I-84 heads southeast towards Utah. I-86 continues due east and heads to Pocatello, meeting with Interstate 15.

Route description

Interstate 84 enters Idaho after crossing the Snake River. The highway proceeds southeast, passing the community of Fruitland, and reaching an interchange with U.S. Route 95. The roadway proceeds southward, reaching interchanges with U.S. Route 30 and Old U.S. Route 30 as well as passing numerous small buildings. The road continues southeast, traveling parallel to Old U.S. Route 30, reaching an interchange with Idaho State Highway 44. The roadway proceeds, interchanging with U.S. Route 20/U.S. Route 26, which continue concurrently with the highway. Interstate 84 Business splits off the highway in Caldwell, while I-84 interchanges with 10th Avenue before U.S. route 20/26 split off the roadway. The highway continues southeast through Caldwell, interchanging with several small roads, before bending east, and entering Nampa. I-84 Business returns to the parent route within the city. The highway continues through Meridian, reaching interchanges with several small roads. The roadway enters Boise, and reaches an interchange with Interstate 184, its auxiliary route. The highway turns southeast, passing Boise Airport, and interchanges with several roads, before reaching an interchange with U.S. routes 20 and 26, which continue concurrently with I-84. The road proceeds southeast, out of Boise, and enters rural area. The highway interchanges with a few small roads, before bypassing Mountain Home, where Interstate 84 business splits off and enters the community.

After bypassing Mountain Home, I-84 business reenters the highway, which proceeds eastward, traveling parallel to the Snake River, before bypassing Glenns Ferry. The highway continues east, traveling parallel to the Snake, interchanging repeatedly with Old U.S. Route 30, before bypassing the community of Bliss. The highway bends southeast, continuing, and passing through Malad Gorge State Park. The roadway continues southeast, bypassing the community of Wendell, The highway continues east, before turning southeast, and bypassing the community of Jerome. It continues to an interchange with U.S. Route 93, before returning to running parallel to the Snake River. The road proceeds east, passing the Hazelton Municipal Airport, and interchanging with several small roads. The road continues, passing north of the community of Burley, and proceeding east. The highway proceeds eastward, before reaching an interchange with Interstate 86, and turning southeast. The road proceeds southeast, traveling parallel to Idaho State Highway 81 for a short distance. The highway enters mountainous area, and bends slightly east and west several times. After exiting the mountainous region, the highway proceeds southeast to the Idaho–Utah state line, where it continues into Utah.[1]


(As of June 2008) The current pavement starting from the Broadway Interchange in Boise to just before the Cole and Overland Interchange is the original pavement built almost 40 years ago. The Idaho Transportation Department is planning to add a third and fourth lane in that area and repave the bumpy road. In the area between the Meridian Interchange and the Garrity Interchange they are currently creating a third lane due to the heavy traffic in that area. The lanes are now open between Broadway (Exit 54) and the Nampa area (Exit 38). ITD Plans to continue the lanes until about the Caldwell area.

Exit list

County Location Mile[2] # Destinations Notes
Payette 2.876 3 US-95
9.498 9 US-30 west West end of US-30 overlap
12.906 13 Black Canyon Junction
Canyon 17.335 17 Sand Hollow
24.839 25 SH-44
25.994 26 US-20 west / US-26 west West end of US-20/US-26 overlap
Caldwell 26.723 27 I-84 Bus. east to SH-19
27.620 28 10th Avenue – Caldwell City Center
28.650 29 US-20 east / US-26 east (Franklin Road) East end of US-20/US-26 overlap
Nampa 33.539 33 SH-55 south / Midland Boulevard West end of SH-55 overlap; signed as exits 33A (SH-55) and 33B (Midland Boulevard) westbound
34.965 35 Northside Boulevard
35.985 36 Franklin Boulevard
37.945 38 I-84 Bus. west (Garrity Boulevard)
Ada Meridian 42.000 42 Ten Mile Road
44.007 44 SH-69
45.998 46 SH-55 north East end of SH-55 overlap
Boise 49.307 49 I-184 east / Franklin Road
50.140 50 Overland Road, Cole Road Signed as exits 50A (West Overland Road) and 50B (Cole Road/Overland Road) eastbound, and 50A (Cole Road/Overland Road) and 50B (East Overland Road) westbound
51.997 52 Orchard Street
53.483 53 Vista Avenue – Boise Airport
54.485 54 US-20 west / US-26 west (Broadway Avenue) West end of US-20/US-26 overlap
56.932 57 SH-21 (Gowen Road)
59.510 59 South Eisenman Road Interchange Signed as exits 59A (South Eisenman IC) and 59B (Memory Road) eastbound
63.517 64 Blacks Creek Road – Kuna
70.772 71 Orchard, Mayfield
Elmore 74.333 74 Simco Road
90.280 90 I-84 Bus. east to SH-51 / SH-67
Mountain Home 95.193 95 US-20 east East end of US-20 overlap
99.570 99 I-84 Bus. west (Bennett Road, Old Oregon Trail Road) to SH-51 / SH-67
111.800 112 I-84 Bus. east to SH-78
113.856 114 I-84 Bus. west to SH-78 / Cold Springs Road Westbound exit and eastbound entrance
120.149 120 I-84 Bus. east Eastbound exit and westbound entrance
121.094 121 I-84 Bus. west
125.159 125 Paradise Valley
128.993 129 King Hill
Gooding 137.060 137 I-84 Bus. east / US-30 east / Pioneer Road East end of US-30 overlap
140.405 141 I-84 Bus. west / US-26 east to US-30 East end of US-26 overlap
146.870 147 Tuttle
155.260 155 To SH-46
156.581 157 SH-46
Jerome 165.160 165 SH-25
168.010 168 SH-79
173.013 173 US-93 – Wells, Sun Valley, Twin Falls
181.930 182 SH-50
188.301 188 Valley Road – Hazelton, Eden
193.525 194 SH-25 west (Ridgeway Road) West end of SH-25 overlap
200.536 201 SH-25 east / Kasota Road East end of SH-25 overlap
208.015 208 I-84 Bus. east / SH-27
210.591 211 I-84 Bus. west / US-30 west / SH-24 West end of US-30 overlap
Cassia 216.395 216 SH-25 / SH-77
221.880 222 I-86 east / US-30 east to I-15 East end of US-30 overlap; former I-15W east
227.950 228 To SH-81 / Yale Road
236.655 237 Idahome Road
244.810 245 Sublett Road – Malta
253.705 254 Sweetzer Road
Oneida 262.512 263 Juniper Road


Interstate 84
Previous state:
Idaho Next state:
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