List of Interstate Highways

From Freepedia

Primary interstates are the major interstate highways of the United States and are assigned a one or two-digit route number. Even route numbers are assigned to east/west routes, with the lower numbered routes being further south (I-10) and higher numbered routes in the north (I-90). Similarly, odd route numbers are assigned to north/south routes, with the lower numbered routes being further west (I-5) and the higher numbered routes being further east (I-95).

Three-digit interstates are spur or loop interstates that usually service large cities and suburbs. The last two digits of a three-digit interstate are always the number of the parent route, the primary interstate where it originated. If the first digit is odd, the interstate is typically a spur route while if the first digit is even, the interstate is typically a loop route. Three-digit interstates are covered in their parent route's article, and those that have their own articles are linked below. (In the table below, interstates designated with an asterisk are "secret" interstates -- that is, they are not signposted as interstates.)

• Notable exceptions to these numbering standards are Interstate 238 in California and Interstate 99 in Pennsylvania.

Contents 1 Primary Interstates 2 Hawaiian Interstates 3 Alaskan and Puerto Rican Interstates 4 External links

Primary Interstates

Image:Interstate4.png Interstate 4	- Tampa, FL (I-275) to Daytona Beach, FL (I-95)
Image:Interstate5.png Interstate 5	- San Ysidro, CA (Mexican border) to Blaine, WA (Canadian border) Associated routes: I-105 | I-205 | I-305* | I-405 | I-505 | I-605 | I-705 | I-805
Image:Interstate8.png Interstate 8	- San Diego, CA to Casa Grande, AZ (I-10)
Image:Interstate10.png Interstate 10	- Santa Monica, CA to Jacksonville, FL (I-95) Associated routes: I-110 | I-210 | I-310 | I-410 | I-510 | I-610 | I-710 | I-910
Image:Interstate12.png Interstate 12	- Baton Rouge, LA (I-10) to Alton, LA (I-10)
Image:Interstate15.png Interstate 15	- San Diego, CA (CA-15) to Sweetgrass, MT (Canadian border) Associated routes: I-115 | I-215 | I-315* | I-515
Image:Interstate16.png Interstate 16	- Macon, GA (I-75) to Savannah, GA Associated route: I-516
Image:Interstate17.png Interstate 17	- Phoenix, AZ (I-10) to Flagstaff, AZ (I-40)
Image:Interstate19.png Interstate 19	- Nogales, AZ (Mexican border) to Tucson, AZ (I-10)
Image:Interstate20.png Interstate 20	- Kent, TX (I-10) to Florence, SC (I-95) Associated routes: I-220 | I-520 | I-820
Image:Interstate22.png Interstate 22	- Memphis, TN (I-55 & I-40) to Birmingham, AL (I-20, I-59 & I-65) Under construction - opening 2006
Image:Interstate24.png Interstate 24	- Pulley's Mill, IL (I-57) to Chattanooga, TN (I-75) Associated route: I-124
Image:Interstate25.png Interstate 25	- Las Cruces, NM (I-10) to Buffalo, WY (I-90) Associated route: I-225
Image:Interstate26.png Interstate 26	- Colonial Heights, TN (I-81) to Charleston, SC (US-17) Associated routes: I-126 | I-526
Image:Interstate27.png Interstate 27	- Lubbock, TX to Amarillo, TX (I-40)
Image:Interstate29.png Interstate 29	- Kansas City, MO (I-35 & I-70) to Pembina, ND (Canadian border) Associated routes: I-129 | I-229
Image:Interstate30.png Interstate 30	- Fort Worth, TX (I-20) to Little Rock, AR (I-40) Associated routes: I-430 | I-530 | I-630
Image:Interstate35.png Interstate 35	- Laredo, TX (Mexican border) to Duluth, MN (MN-61) Associated routes: I-35E | I-35W | I-135 | I-235 | I-335 | I-435 | I-535 | I-635
Image:Interstate37.png Interstate 37	- Corpus Christi, TX (US-181) to San Antonio, TX (I-35)
Image:Interstate39.png Interstate 39	- Normal, IL (I-55) to Wausau, WI
Image:Interstate40.png Interstate 40	- Barstow, CA (I-15) to Wilmington, NC (NC-132) Associated routes: I-140 | I-240 | I-440 | I-540 | I-840
Image:Interstate43.png Interstate 43	- Beloit, WI (I-39, I-90 and I-94) to Green Bay, WI (US-41)
Image:Interstate44.png Interstate 44	- Wichita Falls, TX (US-287) to St. Louis, MO (I-55) Associated routes: I-244 | I-444*
Image:Interstate45.png Interstate 45	- Galveston, TX (TX-124) to Dallas, TX (I-30) Associated route: I-345*
Image:Interstate49.png Interstate 49	- Lafayette, LA (I-10) to Shreveport, LA (I-20)
Image:Interstate55.png Interstate 55	- La Place, LA (I-10) to Chicago, IL (US-41) Associated routes: I-155 | I-255
Image:Interstate57.png Interstate 57	- Miner, MO (I-55) to Chicago, IL (I-94)
Image:Interstate59.png Interstate 59	- Alton, LA (I-10 & I-12) to Lookout Mountain, GA (I-24) Associated routes: I-359 | I-459 | I-759
Image:Interstate64.png Interstate 64	- St. Louis, MO (I-270) to Chesapeake, VA (I-264 & I-664) Associated routes: I-164 | I-264 | I-464 | I-564 | I-664
Image:Interstate65.png Interstate 65	- Mobile, AL (I-10) to Gary, IN (I-90) Associated routes: I-165 | I-465 | I-565 | I-865
Image:Interstate66.png Interstate 66	- Middletown, VA (I-81) to Washington, D.C. (US-29)
Image:Interstate68.png Interstate 68	- Morgantown, WV (I-79) to Hancock, MD (I-70)
Image:Interstate69.png Interstate 69	- Indianapolis, IN (I-465) to Port Huron, MI (Canadian border) Associated route: I-469
Image:Interstate70.png Interstate 70	- Cove Fort, UT (I-15) to Baltimore, MD (I-695) Associated routes: I-170 | I-270 | I-370 | I-470 | I-670
Image:Interstate71.png Interstate 71	- Louisville, KY (I-64) to Cleveland, OH (I-90) Associated routes: I-271 | I-471
Image:Interstate72.png Interstate 72	- Hannibal, MO (US-61) to Champaign, IL (I-57) Associated route: I-172
Image:Interstate73.png Interstate 73	- Candor, NC (US-220) to Greensboro, NC (I-40 & I-85)
Image:Interstate74.png Interstate 74	- Bettendorf, IA (I-80) to Cincinnati, OH (I-75) Associated route: I-474
Image:Interstate75.png Interstate 75	- Ft. Lauderdale, FL (FL-826) to Sault Ste. Marie, MI (Canadian border) Associated routes: I-175 | I-275 | I-375 | I-475 | I-575 | I-675
Image:Interstate76.png Interstate 76	- West - Denver, CO (I-70) to Big Springs, NE (I-80)
Image:Interstate76.png Interstate 76	- East - Westfield Center, OH (I-71) to Camden, NJ (I-295) Associated routes: I-176 | I-276 | I-376 | I-476 | I-676
Image:Interstate77.png Interstate 77	- Columbia, SC (I-26) to Cleveland, OH (I-90) Associated route: I-277
Image:Interstate78.png Interstate 78	- Bordnersville, PA (I-81) to New York City, NY Associated routes: I-278 | I-478* | I-678 | I-878*
Image:Interstate79.png Interstate 79	- Charleston, WV (I-77) to Erie, PA (PA-5) Associated routes: I-279 | I-579
Image:Interstate80.png Interstate 80	- San Francisco, CA (US-101) to Fort Lee, NJ (I-95) Associated routes: I-180 | I-280 | I-380 | I-480 | I-580 | I-680 | I-780 | I-880 | I-980
Image:Interstate81.png Interstate 81	- Dandridge, TN (I-40) to Fisher's Landing, NY (Canadian border) Associated routes: I-181 | I-381 | I-481 | I-581
Image:Interstate82.png Interstate 82	- Ellensburg, WA (I-90) to Hermiston, OR (I-84) Associated route: I-182
Image:Interstate83.png Interstate 83	- Baltimore, MD to Harrisburg, PA (I-81) Associated route: I-283
Image:Interstate84.png Interstate 84	- West - Portland, OR (I-5) to Echo, UT (I-80) Associated route: I-184
Image:Interstate84.png Interstate 84	- East - Scranton, PA (I-81) to Sturbridge, MA (I-90) Associated routes: I-384 | I-684
Image:Interstate85.png Interstate 85	- Montgomery, AL (I-65) to Petersburg, VA (I-95) Associated routes: I-185 | I-285 | I-385 | I-485 | I-585 | I-985
Image:Interstate86.png Interstate 86	- West - Heyburn, ID (I-84) to Pocatello, ID (I-15)
Image:Interstate86.png Interstate 86	- East - Erie, PA (I-90) to Elmira, NY (NY-17)
Image:Interstate87.png Interstate 87	- New York, NY (I-278) to Champlain, NY (Canadian border) Associated routes: I-287 | I-587 | I-787
Image:Interstate88.png Interstate 88	- West - Moline, IL (I-80) to Chicago, IL (I-290)
Image:Interstate88.png Interstate 88	- East - Binghamton, NY (I-81) to Schenectady, NY (I-90)
Image:Interstate89.png Interstate 89	- Concord, NH (I-93) to Highgate Springs, VT (Canadian border) Associated route: I-189
Image:Interstate90.png Interstate 90	- Seattle, WA to Boston, MA Associated routes: I-190 | I-290 | I-390 | I-490 | I-590 | I-690 | I-790 | I-890 | I-990
Image:Interstate91.png Interstate 91	- New Haven, CT (I-95) to Derby Line, VT (Canadian border) Associated routes: I-291 | I-391 | I-691
Image:Interstate93.png Interstate 93	- Canton, MA (I-95) to St. Johnsbury, VT (I-91) Associated routes: I-293 | I-393
Image:Interstate94.png Interstate 94	- Billings, MT (I-90) to Port Huron, MI (Canadian border) Associated routes: I-194 | I-294 | I-394 | I-494 | I-694 | I-794 | I-894
Image:Interstate95.png Interstate 95	- Miami, FL (US-1) to Houlton, ME (Canadian border) Associated routes: I-195 | I-295 | I-395 | I-495 | I-595 | I-695 | I-795 | I-895
Image:Interstate96.png Interstate 96	- Muskegon, MI (US-31) to Detroit, MI (I-75) Associated routes: I-196 | I-296* | I-496 | I-696
Image:Interstate97.png Interstate 97	- Annapolis, MD (US-50) to Baltimore, MD (I-695)
Image:Interstate99.png Interstate 99	- Bedford, PA (I-76) to Bald Eagle, PA (US-220)
Image:Interstate-238.png Interstate 238	- Hayward, CA (I-580) to San Lorenzo, CA (I-880)

Hawaiian Interstates

The interstate highways in Hawaii are signed with the standard Interstate shield, with the letter "H-" prefixed before the number. They are fully controlled-access routes built to the same standards as the mainland Interstate routes.

• Image:InterstateH1.png Interstate H-1

Associated route: I-H-201

• Image:InterstateH2.png Interstate H-2
• Image:InterstateH3.png Interstate H-3

Alaskan and Puerto Rican Interstates

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." [1]

Alaska's "Interstates" are unsigned, though they all have state highway numbers (which don't match the Interstate numbers).[2]

• Interstate A-1
• Interstate A-2
• Interstate A-3
• Interstate A-4

Like Alaska, Puerto Rico signs its "Interstates" as territorial routes, and the numbers do not match their official Interstate designations. However, many of the territory's routes are freeway-standard toll roads.[3]

• Interstate PRI-1
• Interstate PRI-2
• Interstate PRI-3

edit Primary Interstate Highways							Image:Interstate blank.png
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	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 Interstate Highways
A-1	A-2	A-3	A-4	PRI-1	PRI-2	PRI-3
Lists Two-digit Interstates - Three-digit Interstates Gaps in Interstates - Intrastate Interstates Interstate standards - Proposed Interstates

External links

• Alaska Roads - Interstate ends photos
• Puerto Rico road photos
• The Dwight D. Eisenhower National System of Interstate and Defense Highways Route Log and Finder List
• 3-digit Interstate Highways