Interstate 184

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Interstate 184 marker

Interstate 184
Route information
Maintained by ITD
Length: 3.62 mi[1] (5.83 km)
Existed: 1980 (completed 1990) – present
Major junctions
West end: I-84 / US 30 in Boise
East end: US 20 / US 26 in Boise
Highway system
SH 167 SH 200

Interstate 184 (I-184) is a short Auxiliary Interstate Highway spur route of Interstate 84 located in the U.S. state of Idaho. I-184 connects I-84 travelers to downtown Boise. The western terminus of I-184 is with I-84/U.S. Route 30; the eastern terminus is at U.S. Route 20 and U.S. Route 26 west of downtown Boise.[2]


Until 1980, the freeway was known on paper as Interstate 180N, when Interstate 84 was known as Interstate 80N. This was the only signed suffixed auxiliary Interstate route in the nation, though it was not upgraded to Interstate standards until after the parent route was renamed. Other suffixed routes around the country either were too short to merit an auxiliary route or used the unsuffixed route number for its auxiliary routes. This was illustrated by Interstate 80S in Pennsylvania, whose auxiliary routes were I-180, I-280, I-480, and I-680 respectively.

When Interstate 80N was redesignated Interstate 84, this highway was redesignated Business Loop I-84 through Boise. The current I-184 designation was implemented when the construction upgrading the route to Interstate standards was completed in 1989.

Interstate 184 is the only three-digit interstate route in Idaho.

Exit list[edit]

The entire route is in Boise, Ada County.

mi[1] km Exit Destinations Notes
0.00 0.00 0 I-84 (US 30) – Mountain Home, Nampa, Airport Western terminus; westbound exit and eastbound entrance; I-84 exit 49
1.08 1.74 1A Franklin Road
1.33 2.14 1B Cole Road Westbound exit only
2.54 4.09 2 Curtis Road Westbound exit signed as "Curtis Road, Fairview Avenue"
3 Fairview Avenue Eastbound exit only
3.62 5.83 US 20 east / US 26 east – Garden City, Fairgrounds Eastern terminus; westbound exit and eastbound entrance
1.000 mi = 1.609 km; 1.000 km = 0.621 mi

See also[edit]


External links[edit]

Route map: Google

KML is from Wikidata