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Associated routes: [[Interstate 165 (disambiguation)|I-165]], [[Interstate 265|I-265]], [[Interstate 465|I-465]], [[Interstate 565|I-565]], [[Interstate 865|I-865]]; Planned: [[Cumberland Parkway|I-365 in Kentucky]]"},"state":{"wt":""}},"i":37}},"\n",{"template":{"target":{"wt":"routelist row\n","href":"./Template:Routelist_row"},"params":{"country":{"wt":"USA"},"type":{"wt":"I"},"route":{"wt":"66"},"dab":{"wt":"Kansas–Kentucky"},"length_mi":{"wt":""},"terminus_a":{"wt":"[[Wichita, Kansas]]"},"terminus_b":{"wt":"Near [[Pikeville, Kentucky]]"},"established":{"wt":"1991"},"established_ref":{"wt":""},"circa_established":{"wt":""},"decommissioned":{"wt":"2015"},"decommissioned_ref":{"wt":"{{Cite press release |first= Carrie |last= Nelsen |title= For Immediate Release |url= http://www.66corridor.org/doclib/docs%5C2015-07-09PressRelease.pdf |archive-url= https://web.archive.org/web/20150906094950/http://www.66corridor.org/doclib/docs%5C2015-07-09PressRelease.pdf |url-status= dead |archive-date= September 6, 2015 |publisher= Illinois Department of Transportation |date= July 9, 2015 }}"},"notes":{"wt":"Served four states: Kansas, Missouri, Illinois, Kentucky
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Associated routes: [[Interstate 381|I-381]], [[Interstate 481|I-481]], [[Interstate 581|I-581]], [[Interstate 781|I-781]]"},"state":{"wt":""}},"i":54}},"\n",{"template":{"target":{"wt":"routelist row\n","href":"./Template:Routelist_row"},"params":{"country":{"wt":"USA"},"type":{"wt":"I"},"route":{"wt":"82"},"length_mi":{"wt":"143.58"},"terminus_a":{"wt":"[[#I0090|I-90]] in [[Ellensburg, Washington]]"},"terminus_b":{"wt":"[[Interstate 84 (west)|I-84]] in [[Hermiston, Oregon]]"},"established":{"wt":"1957"},"notes":{"wt":"Serves two states: Washington, Oregon
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Associated routes: [[Interstate 190 (disambiguation)|I-190]], [[Interstate 290 (disambiguation)|I-290]], [[Interstate 390|I-390]], [[Interstate 490 (disambiguation)|I-490]], [[Interstate 590|I-590]], [[Interstate 690|I-690]], [[Interstate 790|I-790]], [[Interstate 890|I-890]], [[Interstate 990|I-990]]
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Associated routes: [[Interstate 291 (disambiguation)|I-291]], [[Interstate 391|I-391]], [[Interstate 691|I-691]]"},"state":{"wt":""}},"i":71}},"\n",{"template":{"target":{"wt":"routelist row\n","href":"./Template:Routelist_row"},"params":{"country":{"wt":"USA"},"type":{"wt":"I"},"route":{"wt":"93"},"length_mi":{"wt":"189.95"},"terminus_a":{"wt":"[[#I0095|I-95]]/[[U.S. Route 1|US 1]] in [[Canton, Massachusetts]]"},"terminus_b":{"wt":"[[#I0091|I-91]] in [[St. Johnsbury, Vermont]]"},"established":{"wt":"1957"},"notes":{"wt":"Serves three states: [[Interstate 93 in Massachusetts|Massachusetts]], [[Interstate 93 in New Hampshire|New Hampshire]], [[Interstate 93 in Vermont|Vermont]]
Associated routes: [[Interstate 293|I-293]], [[Interstate 393|I-393]]"},"state":{"wt":""}},"i":72}},"\n",{"template":{"target":{"wt":"routelist row\n","href":"./Template:Routelist_row"},"params":{"country":{"wt":"USA"},"type":{"wt":"I"},"route":{"wt":"94"},"length_mi":{"wt":"1585.20"},"terminus_a":{"wt":"[[#I0090|I-90]] in [[Lockwood, Montana]]"},"terminus_b":{"wt":"[[Ontario Highway 402|Highway 402]] at [[Canada–United States border|Canadian border]] in [[Port Huron, Michigan]]"},"established":{"wt":"1956"},"notes":{"wt":"Serves seven states: [[Interstate 94 in Montana|Montana]], [[Interstate 94 in North Dakota|North Dakota]], [[Interstate 94 in Minnesota|Minnesota]], [[Interstate 94 in Wisconsin|Wisconsin]], [[Interstate 94 in Illinois|Illinois]], [[Interstate 94 in Indiana|Indiana]], [[Interstate 94 in Michigan|Michigan]]
Associated routes: [[Interstate 194 (disambiguation)|I-194]], [[Interstate 294|I-294]], [[Interstate 394|I-394]], [[Interstate 494|I-494]], [[Interstate 694|I-694]], [[Interstate 794|I-794]], [[Interstate 894|I-894]]"},"state":{"wt":""}},"i":73}},"\n",{"template":{"target":{"wt":"routelist row\n","href":"./Template:Routelist_row"},"params":{"country":{"wt":"USA"},"type":{"wt":"I"},"route":{"wt":"95"},"length_mi":{"wt":"1919.31"},"terminus_a":{"wt":"[[U.S. Route 1|US 1]] in [[Miami, Florida]]"},"terminus_b":{"wt":"[[New Brunswick Route 95|NB 95]] at [[Canada–United States border|Canadian border]] in [[Houlton, Maine]]"},"established":{"wt":"1957"},"notes":{"wt":"Serves [[Woodrow Wilson Bridge|DC]] and 15 states: [[Interstate 95 in Florida|Florida]], [[Interstate 95 in Georgia|Georgia]], [[Interstate 95 in South Carolina|South Carolina]], [[Interstate 95 in North Carolina|North Carolina]], [[Interstate 95 in Virginia|Virginia]], [[Interstate 95 in Maryland|Maryland]], [[Interstate 95 in Delaware|Delaware]], [[Interstate 95 in Pennsylvania|Pennsylvania]], [[Interstate 95 in New Jersey|New Jersey]], [[Interstate 95 in New York|New York]], [[Interstate 95 in Connecticut|Connecticut]], [[Interstate 95 in Rhode Island|Rhode Island]], [[Interstate 95 in Massachusetts|Massachusetts]], [[Interstate 95 in New Hampshire|New Hampshire]], [[Interstate 95 in Maine|Maine]]
Associated routes: [[Interstate 195 (disambiguation)|I-195]], [[Interstate 295 (disambiguation)|I-295]], [[Interstate 395 (disambiguation)|I-395]], [[Interstate 495 (disambiguation)|I-495]], [[Interstate 595 (disambiguation)|I-595]], [[Interstate 695 (disambiguation)|I-695]], [[Interstate 795 (disambiguation)|I-795]], [[Interstate 895|I-895]]
Longest primary north-south Interstate highway"},"state":{"wt":""}},"i":74}},"\n",{"template":{"target":{"wt":"routelist row\n","href":"./Template:Routelist_row"},"params":{"country":{"wt":"USA"},"type":{"wt":"I"},"route":{"wt":"96"},"length_mi":{"wt":"192.06"},"terminus_a":{"wt":"[[U.S. Route 31 in Michigan|US 31]] in [[Norton Shores, Michigan]]"},"terminus_b":{"wt":"[[#I0075|I-75]] in [[Detroit|Detroit, Michigan]]"},"established":{"wt":"1959"},"notes":{"wt":"Michigan only
Associated routes: [[Interstate 196|I-196]], [[Interstate 296|I-296]], [[Interstate 496|I-496]], [[Interstate 696|I-696]]"},"state":{"wt":""}},"i":75}},"\n",{"template":{"target":{"wt":"routelist row\n","href":"./Template:Routelist_row"},"params":{"country":{"wt":"USA"},"type":{"wt":"I"},"route":{"wt":"97"},"length_mi":{"wt":"17.62"},"terminus_a":{"wt":"[[U.S. Route 50 in Maryland|US 50]]/[[U.S. Route 301 in Maryland|US 301]] in [[Annapolis, Maryland]]"},"terminus_b":{"wt":"[[Interstate 695 (Maryland)|I-695]]/[[Interstate 895 (Maryland)|I-895A]] in [[Glen Burnie, Maryland]]"},"established":{"wt":"1987"},"notes":{"wt":"Maryland only"},"state":{"wt":""}},"i":76}},"\n",{"template":{"target":{"wt":"routelist row\n","href":"./Template:Routelist_row"},"params":{"country":{"wt":"USA"},"type":{"wt":"I"},"route":{"wt":"99"},"length_mi":{"wt":"98.34"},"terminus_a":{"wt":"[[U.S. Route 220 in Pennsylvania|US 220]] in [[Bedford, Pennsylvania]]"},"terminus_b":{"wt":"[[Interstate 86 (east)|I-86]]/[[New York State Route 17|NY 17]] in [[Painted Post, New York]]"},"established":{"wt":"1998"},"notes":{"wt":"Unfinished in Pennsylvania; serves two states: Pennsylvania, [[U.S. Route 15 in New York|New York]]"},"state":{"wt":""}},"i":77}},"\n",{"template":{"target":{"wt":"routelist bottom","href":"./Template:Routelist_bottom"},"params":{"keys":{"wt":"former,future"}},"i":78}}]}" id="mwIQ">
In addition to the 48 contiguous states, Interstate Highways are found in Hawaii, Alaska, and Puerto Rico. The Federal Highway Administration funds four routes in Alaska and three routes in Puerto Rico under the same program as the rest of the Interstate Highway System. However, these routes are not required to meet the same standards as the mainland routes:
Highways on the Interstate System in Alaska and Puerto Rico shall be designed in accordance with such geometric and construction standards as are adequate for current and probable future traffic demands and the needs of the locality of the highway. [5]
The Interstate Highways on the island of Oʻahu, Hawaii are signed with the standard Interstate Highway shield, with the letter "H-" prefixed before the number. They are fully controlled-access routes built to the same standards as the mainland Interstate Highways.
Number | Length (mi) [2] | Length (km) | Southern or western terminus | Northern or eastern terminus | Formed | Removed | Notes | |
---|---|---|---|---|---|---|---|---|
![]() | 27.16 | 43.71 | Route 93 in Kapolei | Route 72 in Honolulu | 1960 | current | Associated route: H-201 | |
![]() | 8.33 | 13.41 | H-1 in Pearl City | Route 99 in Wahiawa | 1960 | current | ||
![]() | 15.32 | 24.66 | H-1/H-201 in Halawa | Marine Corps Base Hawaii | 1997 | current | ||
Alaska's Interstate Highways are unsigned as such, although they all have state highway numbers that do not match the Interstate Highway numbers. [6]
Number | Length (mi) [2] | Length (km) | Southern or western terminus | Northern or eastern terminus | Formed | Removed | Notes | |
---|---|---|---|---|---|---|---|---|
![]() | 408.23 | 656.98 | Anchorage | Canadian border in Alcan Border | 1976 | current | Glenn Highway, Richardson Highway, Tok Cut-Off, Alaska Highway [7] [8] [9] [10] | |
![]() | 202.18 | 325.38 | Tok | Fairbanks | 1976 | current | Alaska Highway, Richardson Highway [8] [9] [10] | |
![]() | 148.12 | 238.38 | Anchorage | Soldotna | 1976 | current | Seward Highway, Sterling Highway [7] [9] [10] | |
![]() | 323.69 | 520.93 | Gateway, near Palmer | Fairbanks | 1976 | current | Parks Highway [7] [8] [9] [10] | |
Puerto Rico signs its Interstate Highways as territorial routes, as the numbers do not match their official Interstate Highway designations. Many of the territory's routes are freeway-standard toll roads. [11]
Number | Length (mi) [2] | Length (km) | Southern or western terminus | Northern or eastern terminus | Formed | Removed | Notes | |
---|---|---|---|---|---|---|---|---|
![]() | 71.08 | 114.39 | PR-2 in Ponce | PR-2 in San Juan | 1976 | current | Follows PR-52 | |
![]() | 138.13 | 222.30 | PR-1 in Ponce | PR-3 in San Juan | 1976 | current | Follows PR-22 | |
![]() | 40.56 | 65.27 | PR-3 in Humacao | PR-2 in San Juan | 1976 | current | Follows PR-66 | |