Interstate 84 (west)

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Interstate 84
Main route of the Interstate Highway System

Length:

770 mi (1239 km)

Formed:

1966

West end:

I-5 in Portland, OR

Major
junctions:

I-82 in Hermiston, OR

I-86 in Heyburn, ID

I-15 near Ogden, UT

East end:

I-80 in Echo, UT

Columbia River Gorge and I-84 as seen from Crown Point, Oregon

Interstate 84 (abbreviated I-84) is an interstate highway that runs from an intersection with Interstate 5 at Portland, Oregon (Map) to an intersection with Interstate 80 (Map) at Echo, Utah—roughly the same route as the Oregon Trail.

Starting in Portland, where it is referred to as the "Banfield Expressway", the interstate runs through the Columbia River Gorge parallel to the historic Columbia River Highway to The Dalles. It then continues along the Columbia River until it veers in a southeasterly direction at Boardman. It crosses the Blue Mountains, and continues toward Ontario, Oregon at the Idaho border.

Crossing southern Idaho, I-84 passes through Boise (a spur, I-184 connects to the city center), near Twin Falls and through Burley and Rupert. East of Rupert it veers to the southeast and crosses the Utah border. Within Utah I-84 passes through Tremonton, Brigham City and Ogden, terminating at I-80 in the mountains near Echo, Utah.

I-84 was known as I-80N until May 1, 1980 [1]. (The western I-76, branching off in Nebraska and going into Denver, was I-80S.) Federal law restricted the use of suffix letters on interstates, and these two were renumbered, as were some other highways that had E and W branches. The only remaining such split is I-35E and I-35W, which exists in the Dallas/Fort Worth area and the Minneapolis/St. Paul area.

1 Length
2 Major cities
3 Intersections with other interstates
4 Spur routes
5 Trivia
6 See also
7 Reference
8 External links

[edit] Length


Miles	km	state
375	603	Oregon
276	444	Idaho
119	192	Utah

770	1239	Total

[edit] Major cities

Bolded cities are officially-designated control cities for signs.

[edit] Intersections with other interstates

Interstate 5 in Portland, Oregon
Interstate 205 in Portland, Oregon
Interstate 82 in Hermiston, Oregon
Interstate 184 in Boise, Idaho
Interstate 86 in Heyburn, Idaho
Interstate 15 in Tremonton, Utah. They are multiplexed for 39 miles (63 km), until Ogden, Utah.
Interstate 80 in Echo, Utah

[edit] Spur routes

Boise, Idaho - I-184

	edit Auxiliary routes of Interstate 84
	Current and Future (F)	Former
	Idaho

[edit] Trivia

After renumbering, I-84 violated the Interstate Highway Numbering Convention by being south of I-82.
The Portland, Oregon segment of then-I-80N was proposed to run on the Mount Hood Freeway. Plans for this were officially dropped in 1978 after a successful Freeway revolt.
In the Portland metropolitan area, I-84 is sometimes referred to as the Banfield Freeway or simply "the Banfield", although the official name is the Banfield Expressway. The freeway is named after Thomas H. Banfield, chairman of the Oregon Transportation Commission from 1943-1950.
East of Pendleton, Oregon, I-84 traverses the infamous Cabbage Hill grade(a 6% grade). This grade is legendary for the fact that the westbound lanes switchback twice on its descent into Pendleton. Eastbound lanes feature what are the tightest curves on the Interstate system, even though those curves are on the uphill(eastbound) direction. This grade is also well known due to the fact that it features such a great distance between eastbound and westbound lanes.(Nearly 2 miles between directions of travel at points.)
The Utah sections of I-84 not multiplexed with Interstate 15 are defined at Utah Code Annotated § 72-4-114(4).[2]

[edit] See also

Interstate 84 (east)

edit Main Interstate Highways (multiples of 5 in pink)
4	5	8	10	12	15	16	17	19	20	22	24	25	26	27	29	30
35	37	39	40	43	44	45	49	55	57	59	64	65	66	66 (W)		68
69	70	71	72	73	74	75	76 (W)		76 (E)		77	78	79	80	81	82
83	84 (W)		84 (E)		85	86 (W)		86 (E)		87	88 (W)		88 (E)		89	90
91	93	94	95	96	97	99	(238)		H-1		H-2		H-3
Unsigned			A-1		A-2		A-3		A-4		PRI-1		PRI-2		PRI-3
Lists		Main - Auxiliary - Suffixed - Business - Proposed - Unsigned Gaps - Intrastate - Interstate standards - Replaced