List of Interstate Highways

Dwight D. Eisenhower National System of Interstate and Defense Highways
Highway shield for Interstate 90 and the Eisenhower Interstate System
Interstate Highways in the 48 contiguous states
System information
Formed:	June 29, 1956^[1]
Highway names
Interstates:	Interstate X (I-X)
System links
Interstate Highway System Main Auxiliary Suffixed Business

Primary Interstate Highways of the United States are numbered with one- or two-digit designations. Their associated auxiliary highways have three-digit numbers. Generally, odd-numbered routes run north-south, with lower numbers in the west and higher numbers in the east; even-numbered routes run east-west, with lower numbers in the south and higher numbers in the north. Routes divisible by "5" (for example, I-40 or I-75) are major routes, often running coast-to-coast or border-to-border.

Five pairs of numbers are duplicated throughout the system; the corresponding highways are separated by large distances which prevent confusion. Below, these are differentiated from each other by "West" and "East". The main list is followed by sections listing the primary Interstate highways in Alaska, Hawaii, and Puerto Rico.

Primary Interstate Highways

There are 67 primary Interstate Highways listed in the table below, and 43 of them have auxiliary routes.

Number	Length (mi)^[2]	Length (km)	Southern or western terminus	Northern or eastern terminus	Formed	Removed	Notes
I0002 !I‑2	46.8	75.3	Palmview, Texas (US 83)	Harlingen, Texas (I-69E / US 77 / US 83)	2013	current	Texas only Associated routes: none
I0004 !I‑4	132.3	212.9	Tampa, Florida (I-275)	Daytona Beach, Florida (I-95 / SR 400)	1957	current	Florida only Associated routes: none
I0005 !I‑5	1,381.29	2,222.97	San Ysidro, California (MX-1 in Mexico)	Blaine, Washington (BC 99 in Canada)	1956	current	3 states served: CA, OR, WA Associated routes: I-105, I-205, I-305, I-405, I-505, I-605, I-705, I-805; Future: I-905
I0008 !I‑8	348.25	560.45	San Diego, California (Sunset Cliffs Boulevard / Nimitz Boulevard)	Casa Grande, Arizona (I-10)	1964	current	2 states served: CA, AZ Associated routes: none
I0010 !I‑10	2,460.34	3,959.53	Santa Monica, California (SR 1)	Jacksonville, Florida (I-95 / US 17 / SR 228)	1957	current	8 states served: CA, AZ, NM, TX, LA, MS, AL, FL Associated routes: I-110, I-210, I-310, I-410, I-510, I-610, I-710, I-910
I0012 !I‑12	85.59	137.74	Baton Rouge, Louisiana (I-10)	Slidell, Louisiana (I-10 / I-59)	1967	current	Louisiana only Associated routes: none
I0015 !I‑15	1,433.52	2,307.03	San Diego, California (I-8 / SR 15)	Sweetgrass, Montana (Hwy 4 in Canada)	1957	current	6 states served: CA, NV, AZ, UT, ID, MT Associated routes: I-115, I-215, I-315, I-515
I0016 !I‑16	166.81	268.45	Macon, Georgia (I-75)	Savannah, Georgia (US 17 / GA 404 / Montgomery Street)	1972	current	Georgia only Associated route: I-516
I0017 !I‑17	145.76	234.58	Phoenix, Arizona (I-10)	Flagstaff, Arizona (I-40 / AZ-89A)	1961	current	Arizona only Associated routes: none
I0019 !I‑19	63.6	102.4	Nogales, Arizona (MX-15 in Mexico)	Tucson, Arizona (I-10)	1972	current	Arizona only Associated routes: none
I0020 !I‑20	1,539.38	2,477.39	between Kent, Texas and Toyah, Texas (I-10)	Florence, South Carolina (I-95)	1957	current	6 states served: TX, LA, MS, AL, GA, SC Associated routes: I-220, I-520, I-820
I0022 !I‑22	124.70	200.69	Memphis, Tennessee (I-55 / I-40)	Birmingham, Alabama (I-65 / US 31)	2012	current	3 states served: Mississippi, Alabama, Tennessee Planned associated routes: I-222, I-422
I0024 !I‑24	316.36	509.13	Pulley's Mill, Illinois (I-57)	Chattanooga, Tennessee (I-75)	1962	current	4 states served: Illinois, Kentucky, Tennessee, Georgia Associated route: I-124
I0025 !I‑25	1,062.77	1,710.36	Las Cruces, New Mexico (I-10 / US 85 / US 180)	Buffalo, Wyoming (I-90 / US 87)	1957	current	3 states served: New Mexico, Colorado, Wyoming Associated route: I-225
I0026 !I‑26	305.62	491.85	Kingsport, Tennessee (US 11W)	Charleston, South Carolina (US 17)	1960	current	3 states served: Tennessee, North Carolina, South Carolina Associated routes: I-126, I-526
I0027 !I‑27	124.13	199.77	Lubbock, Texas (US 87 / Loop 289)	Amarillo, Texas (I-40 / US 87 / US 287)	1969	current	Texas only Associated routes: none
I0029 !I‑29	755.51	1,215.88	Kansas City, Missouri (I-35 / I-70)	Pembina, North Dakota (US 81 and PTH 29 in Canada)	1958	current	4 states served: Missouri, Iowa, South Dakota, North Dakota Associated routes: I-129, I-229
I0030 !I‑30	366.76	590.24	Fort Worth, Texas (I-20)	North Little Rock, Arkansas (I-40 / US 65 / US 67 / US 167)	1957	current	2 states served: Texas, Arkansas Associated routes: I-430, I-530, I-630; Planned: I-130
I0035 !I‑35	1,568.38	2,524.06	Laredo, Texas (US 83 / SH 359 / BS I-35 as well as MX-85 in Mexico)	Duluth, Minnesota (MN-61 / LSCT / 26th Avenue)	1956	current	6 states served: TX, OK, KS, MO, IA, MN Associated routes: I-35E, I-35W, I-135, I-235, I-335, I-435, I-535, I-635
I0037 !I‑37	143.00	230.14	Corpus Christi, Texas (US 181)	San Antonio, Texas (I-35 / US 281)	1959	current	Texas only Associated routes: none
I0039 !I‑39	306.14	492.68	Normal, Illinois (I-55)	Wausau, Wisconsin (WIS 29 / US-51)	1984	current	2 states served: Illinois, Wisconsin Associated routes: none
I0040 !I‑40	2,555.10	4,112.03	Barstow, California (I-15)	Wilmington, North Carolina (US 117 / NC 132)	1964	current	8 states served: CA, AZ, NM, TX, OK, AR, TN, NC Associated routes: I-140, I-240, I-440, I-540, I-640, I-840
I0041 !I‑41	176.33	283.78	Russell, Illinois (I-94 / US 41)	Howard, Wisconsin (I-43)	2015	current	2 states served: Illinois, Wisconsin Associated routes: none
I0043 !I‑43	191.55	308.27	Beloit, Wisconsin (I-39 / I-90)	Howard, Wisconsin (US 41 / US 141 / I-41)	1981	current	Wisconsin only Associated routes: none
I0044 !I‑44	633.79	1,019.99	Wichita Falls, Texas (US 82 / US 277 / US 281 / US 287)	St. Louis, Missouri (I-70)	1958	current	3 states served: Texas, Oklahoma, Missouri Associated routes: I-244, I-444
I0045 !I‑45	284.91	458.52	Galveston, Texas (TX 87)	Dallas, Texas (I-30)	1971	current	Texas only Associated route: I-345
I0049 !I‑49	388.25	624.83	New Orleans, Louisiana (I-10 future)	Kansas City, Missouri (I-435)	1984	current	Unfinished Louisiana-Arkansas section: Blanchard, Louisiana (LA 1) to Texarkana, Arkansas (US 59 / US 71) 3 states served: Louisiana, Arkansas, Missouri Associated routes: none
I0055 !I‑55	964.25	1,551.81	Laplace, Louisiana (I-10)	Chicago, Illinois (US 41, Lake Shore Drive)	1960	current	6 states served: LA, MS, TN, AR, MO, IL Associated routes: I-155, I-255, I-355; I-555
I0057 !I‑57	386.12	621.40	Miner, Missouri (I-55)	Chicago, Illinois (I-94)	1965	current	2 states served: Missouri, Illinois Associated routes: none
I0059 !I‑59	445.23	716.53	Slidell, Louisiana (I-10 / I-12)	Lookout Mountain, Georgia (I-24)	1960	current	4 states served: Louisiana, Mississippi, Alabama, Georgia Associated routes: I-359, I-459, I-759
I0064 !I‑64	953.74	1,534.90	Wentzville, Missouri (I-70)	Chesapeake, Virginia (I-264 / I-664)	1961	current	6 states served: MO, IL, IN, KY, WV, VA Associated routes: I-264, I-464, I-564, I-664
I0065 !I‑65	887.30	1,427.97	Mobile, Alabama (I-10)	Gary, Indiana (I-90)	1958	current	4 states served: Alabama, Tennessee, Kentucky, Indiana Associated routes: I-165, I-265, I-465, I-565, I-865
I0066 !I‑66	76.28	122.76	Front Royal, Virginia (I-81)	Washington, D.C. (US 29)	1982	current	2 states served: Virginia, District of Columbia Associated routes: none
I0068 !I‑68	112.9	181.7	Morgantown, West Virginia (I-79)	Hancock, Maryland (I-70)	1991	current	2 states served: West Virginia, Maryland Associated routes: none
I0069 !I‑69	705.40	1,135.23	Victoria, Texas (I-69E / US 77 future & I-69W / US 59 future)	Port Huron, Michigan (Hwy 402 in Canada)	1957	current	Unfinished Texas section: Rosenberg (US-59 / Spur 529) to Splendora (US 59 / Mandell Road) Unfinished Mississippi-Tennessee section: Banks, Mississippi (MS 304 / MS 713) to Frayser, Tennessee (US 51 / TN 3) Unfinished Indiana section: Elberfeld, Indiana (I-64) to Scotland, Indiana (US 231) 6 states served: TX, MS, TN, KY, IN, MI. Planned/started in 2 more: LA, AR Associated routes: I-69C, I-69E, I-69W, I-169, I-269, I-369, I-469; Planned: I-169 in Tennessee, I-369 in Kentucky
I0070 !I‑70	2,153.13	3,465.13	Cove Fort, Utah (I-15)	Baltimore, Maryland (Park and ride)	1956	current	10 states served: UT, CO, KS, MO, IL, IN, OH, WV, PA, MD Associated routes: I-170, I-270, I-370, I-470, I-670
I0071 !I‑71	343.78	553.26	Louisville, Kentucky (I-64)	Cleveland, Ohio (I-90)	1959	current	2 states served: Kentucky, Ohio Associated routes: I-271, I-471
I0072 !I‑72	179.29	288.54	Hannibal, Missouri (US 61)	Champaign, Illinois (I-57)	1970	current	2 states served: Missouri, Illinois Associated route: I-172
I0073 !I‑73	1,188.3	1,912.4	Briarcliffe Acres, South Carolina (US 17 future)	Sault Ste. Marie, Michigan (Canada future)	1997	current	6 states served: MI (future), OH (future), WV (future), VA (future), NC, SC (future) Associated routes: none
I0074 !I‑74	440.91	709.58	Bettendorf, Iowa (I-80)	Garden City, South Carolina (US 17 Bus. future)	1974	current	8 states served: IA, IL, IN, OH, WV (future), VA (future), NC, SC (future) Associated routes: I-274 (future), I-474
I0075 !I‑75	1,786.47	2,875.04	Hialeah, Florida (SR 826)	Sault Ste. Marie, Michigan (Canada)	1958	current	6 states served: FL, GA, TN, KY, OH, MI Associated routes: I-175, I-275, I-375, I-475, I-575, I-675
I0076 !I‑76	187.34	301.49	West Denver, Colorado (I-70)	Big Springs, Nebraska (I-80)	1975	current	2 states served: Colorado, Nebraska Associated routes: none
I0076 !I‑76	434.36	699.03	East Westfield Center, Ohio (I-71)	Camden, New Jersey (I-295)	1976	current	3 states served: Ohio, Pennsylvania, New Jersey Associated routes: I-176, I-276, I-376, I-476, I-676; Future: I-576
I0077 !I‑77	610.10	981.86	Columbia, South Carolina (I-26)	Cleveland, Ohio (I-90)	1958	current	5 states served: South Carolina, North Carolina, Virginia, West Virginia, Ohio Associated route: I-277
I0078 !I‑78	143.56	231.04	Union Township, Pennsylvania (I-81)	New York City	1957	current	3 states served: Pennsylvania, New Jersey, New York Associated routes: I-278, I-478, I-678, I-878
I0079 !I‑79	343.24	552.39	Charleston, West Virginia (I-77)	Erie, Pennsylvania (PA-5)	1967	current	2 states served: West Virginia, Pennsylvania Associated routes: I-279, I-579
I0080 !I‑80	2,899.54	4,666.36	San Francisco, California (US 101)	Fort Lee, New Jersey (I-95)	1956	current	11 states served: CA, NV, UT, WY, NE, IA, IL, IN, OH, PA, NJ Associated routes: I-180, I-238 I-280, I-380, I-480, I-580, I-680, I-780, I-880, I-980
I0081 !I‑81	854.89	1,375.81	Dandridge, Tennessee (I-40)	Fisher's Landing, New York (Canada)	1961	current	6 states served: TN, VA, WV, MD, PA, NY Associated routes: I-381, I-481, I-581, I-781
I0082 !I‑82	143.58	231.07	Ellensburg, Washington (I-90)	Hermiston, Oregon (I-84)	1956	current	2 states served: Washington, Oregon Associated route: I-182
I0083 !I‑83	85.3	137.3	Baltimore, Maryland	Harrisburg, Pennsylvania (I-81)	1959	current	2 states served: Maryland, Pennsylvania Associated route: I-283
I0084 !I‑84	769.62	1,238.58	West Portland, Oregon (I-5)	Echo, Utah (I-80)	1980	current	3 states served: Oregon, Idaho, Utah Associated route: I-184
I0084 !I‑84	232.4	374.0	East Scranton, Pennsylvania (I-81)	Sturbridge, Massachusetts (I-90)	1963	current	4 states served: Pennsylvania, New York, Connecticut, Massachusetts Associated routes: I-384, I-684
I0085 !I‑85	668.75	1,076.25	Montgomery, Alabama (I-65)	Petersburg, Virginia (I-95)	1958	current	5 states served: Alabama, Georgia, South Carolina, North Carolina, Virginia Associated routes: I-185, I-285, I-385, I-485, I-585, I-785, I-985; Planned: I-685
I0086 !I‑86	62.85	101.15	West Heyburn, Idaho (I-84)	Pocatello, Idaho (I-15)	1980	current	Idaho only Associated routes: none
I0086 !I‑86	183.56	295.41	East Erie, Pennsylvania (I-90)	Woodbury, New York (I-87 future)	1999	current	2 states served: Pennsylvania, New York Associated routes: none
I0087 !I‑87	333.49	536.70	New York City (I-278)	Champlain, New York (A-15 in Canada)	1957	current	New York only Associated routes: I-287, I-587, I-787
I0088 !I‑88	140.6	226.3	West Barstow, Illinois (I-80)	Hillside, Illinois (I-290)	1987	current	Illinois only Associated routes: none
I0088 !I‑88	117.75	189.50	East Binghamton, New York (I-81)	Schenectady, New York (I-90)	1968	current	New York only Associated routes: none
I0089 !I‑89	191.12	307.58	Bow, New Hampshire (I-93)	Highgate Springs, Vermont (Route 133 in Canada / future A-35)	1960	current	2 states served: New Hampshire, Vermont Associated route: I-189
I0090 !I‑90	3,020.54	4,861.09	Seattle, Washington (WA 519)	Boston, Massachusetts (MA 1A)	1956	current	13 states served: WA, ID, MT, WY, SD, MN, WI, IL, IN, OH, PA, NY, MA Associated routes: I-190, I-290, I-390, I-490, I-590, I-690, I-790, I-890, I-990
I0091 !I‑91	290.37	467.31	New Haven, Connecticut/North Haven, Connecticut (I-95)	Derby Line, Vermont (A-55 in Canada)	1958	current	3 states served: Connecticut, Massachusetts, Vermont Associated routes: I-291, I-391, I-691
I0093 !I‑93	189.95	305.69	Canton, Massachusetts (I-95)	St. Johnsbury, Vermont (I-91)	1957	current	3 states served: Massachusetts, New Hampshire, Vermont Associated routes: I-293, I-393
I0094 !I‑94	1,585.20	2,551.13	Billings, Montana (I-90)	Port Huron, Michigan (Hwy 402 in Canada)	1956	current	7 states served: MT, ND, MN, WI, IL, IN, MI Associated routes: I-194, I-294, I-394, I-494, I-694, I-794, I-894
I0095 !I‑95	1,925.74	3,099.18	Miami, Florida (US 1)	Houlton, Maine (Route 95 in Canada)	1957	current	15 states served: FL, GA, SC, NC, VA, MD, DE, PA, NJ, NY, CT, RI, MA, NH, ME Associated routes: I-195, I-295, I-395, I-495, I-595, I-695, I-795, I-895
I0096 !I‑96	192.06	309.09	Muskegon, Michigan (US 31)	Detroit, Michigan (I-75)	1959	current	Michigan only Associated routes: I-196, I-296, I-496, I-696
I0097 !I‑97	17.62	28.36	Annapolis, Maryland (US 50)	Baltimore, Maryland (I-695 / I-895)	1987	current	Maryland only Associated routes: none
I0099 !I‑99	98.86	159.10	Bedford, Pennsylvania (I-70 / I-76)	Painted Post, New York (I-86)	1998	current	Unfinished Pennsylvania section: Bellefonte, Pennsylvania (I-80) to New York border near Lawrenceville, Pennsylvania (US 15) 2 states served: Pennsylvania, New York Associated routes: none

Other Interstate Highways

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.^[3]

”

Hawaii

The Interstate Highways in 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
I0001 !H-1	27.16	43.71	Route 93 in Kapolei	Route 72 in Honolulu	1959	current	Associated route: H-201
I0002 !H-2	8.33	13.41	H-1 in Pearl City	Route 99 in Wahiawa	1976	current
I0003 !H-3	15.32	24.66	H-1 & H-201 in Halawa	Marine Corps Base Hawaii	1997	current

Alaska

Map of the Interstates in Alaska

Alaska's Interstate Highways are unsigned, although they all have state highway numbers that do not match the Interstate Highway numbers.^[4]

Number	Length (mi)^[2]	Length (km)	Southern or western terminus	Northern or eastern terminus	Formed	Removed	Notes
1 !A‑1	408.23	656.98	Anchorage	Canadian border in Alcan Border	1976	current	Glenn Highway, Richardson Highway, Tok Cut-Off, Alaska Highway^[5]^[6]^[7]^[8]
2 !A‑2	202.18	325.38	Tok	Fairbanks	1976	current	Alaska Highway, Richardson Highway^[6]^[7]^[8]
3 !A‑3	148.12	238.38	Anchorage	Soldotna	1976	current	Seward Highway, Sterling Highway^[5]^[7]^[8]
4 !A‑4	323.69	520.93	Gateway, near Palmer	Fairbanks	1976	current	Parks Highway^[5]^[6]^[7]^[8]

Puerto Rico

Map of the Interstates in Puerto Rico

Like Alaska, Puerto Rico signs its Interstate Highways as territorial routes, and the numbers do not match their official Interstate Highway designations. Many of the territory's routes are freeway-standard toll roads.^[9]

Number	Length (mi)^[2]	Length (km)	Southern or western terminus	Northern or eastern terminus	Formed	Removed
I0001 !PRI-1	71.08	114.39	PR-2 in Ponce	PR-2 in San Juan (PR 22/PR 18 interchange)	—	—
I0002 !PRI-2	138.13	222.30	PR-1 in Ponce	PR-3 in San Juan (PR 1/PR 26 interchange)	—	—
I0003 !PRI-3	65.27	105.04	PR-3 in Humacao	PR-2 in San Juan (PR 1/PR 26/PR 66 interchange)	—	—

In popular culture

The title of interactive fiction I-0 refers to the fictional "Interstate Zero".^[10]

References

↑ Weingroff, Richard F. (Summer 1996). "Federal-Aid Highway Act of 1956, Creating the Interstate System". Public Roads. Washington, DC: Federal Highway Administration. 60 (1). Retrieved March 16, 2012.
1 2 3 4 Adderley, Kevin (January 15, 2014). "Table 1: Main Routes of the Dwight D. Eisenhower National System of Interstate and Defense Highways as of December 31, 2013". Route Log and Finder List. Federal Highway Administration.
↑ Staff. "FHWA Route Log and Finder List". Federal Highway Administration. Retrieved May 24, 2007.
↑ Voss, Oscar. "Alaska Roads: Interstate ends photos". Retrieved May 24, 2007.
1 2 3 Witt, Jennifer W. (2010). Annual Traffic Volume Report (PDF) (Report) (2008-2009-2010 ed.). Alaska Department of Transportation & Public Facilities. Retrieved March 15, 2012.
1 2 3 Birkholz, Ethan (2010). Annual Traffic Volume Report (PDF) (Report) (2008-2009-2010 ed.). Alaska Department of Transportation & Public Facilities. Retrieved May 31, 2012.
1 2 3 4 Staff. "Dwight D. Eisenhower Interstate Routes Statewide" (PDF). Federal Highway Administration. Retrieved May 31, 2012.
1 2 3 4 Staff. "Alaska Department of Transportation and Public Facilities Routes by Description: CDS Route Numbers as of 28 October 2008" (PDF). Federal Highway Administration. Retrieved May 31, 2012.
↑ Voss, Oscar. "Puerto Rico road photos". Retrieved May 24, 2007.
↑ "I-0". Interactive Fiction Database. Retrieved 1 February 2016.

External links

Main Interstate Highways

Signed

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76 (E)
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H-1
H-2
H-3

Unsigned

Lists

Primary	Main Suffixed Temporary Future

Auxiliary	Main

Other	Standards Business Bypassed Gaps Tolled

Major Interstates highlighted

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