Back List of auxiliary Interstate Highways English Anexo:Autopistas interestatales auxiliares Spanish Liste des interstates auxiliaires French Lista de autoestradas interestaduais auxiliares dos Estados Unidos Portuguese Danh sách xa lộ liên tiểu bang phụ Vietnamese 美國州際公路輔助線列表 Chinese
This is a list of auxiliary Interstate Highways. These are interstate highways with three digits.
| Hawaii |
| H-201 |
| California |
| I-105 |
| I-205 |
| I-405 |
| I-505 |
| I-605 |
| I-805 |
| I-905 |
| Oregon |
| I-105 |
| I-405 |
| Oregon-Washington |
| I-205 |
| Washington |
| I-405 |
| I-705 |
| California |
| I-110 |
| I-210 |
| I-710 |
| Florida |
| I-110 |
| Louisiana |
| I-110 |
| I-210 |
| I-310 |
| I-510 |
| I-610 |
| Mississippi |
| I-110 |
| Texas |
| I-110 |
| I-410 |
| I-610 |
| California |
| I-215 |
| Montana |
| I-115 |
| Nevada |
| I-215 |
| I-515 |
| Utah |
| I-215 |
| Georgia |
| I-516 |
| Georgia-South Carolina |
| I-520 |
| Louisiana |
| I-220 |
| Mississippi |
| I-220 |
| Texas |
| I-820 |
| Tennessee |
| I-124 |
| Colorado |
| I-225 |
| South Carolina |
| I-126 |
| I-526 |
| Iowa-Nebraska |
| I-129 |
| Missouri |
| I-229 |
| South Dakota |
| I-229 |
| Arkansas |
| I-430 |
| I-530 |
| I-630 |
| Iowa |
| I-235 |
| Kansas |
| I-135 |
| I-235 |
| I-335 |
| Kansas-Missouri |
| I-435 |
| I-635 |
| Minnesota-Wisconsin |
| I-535 |
| Oklahoma |
| I-235 |
| Texas |
| I-635 |
| California |
| I-238 |
| Arkansas |
| I-440 |
| I-540 |
| North Carolina |
| I-140 |
| I-240 |
| I-440 |
| I-540 |
| I-840 |
| Oklahoma |
| I-240 |
| Tennessee |
| I-140 |
| I-240 |
| I-440 |
| I-640 |
| I-840 |
| Oklahoma |
| I-244 |
| I-444 |
| Illinois |
| I-155 |
| I-355 |
| Illinois-Missouri |
| I-255 |
| Missouri-Tennessee |
| I-155 |
| Alabama |
| I-359 |
| I-459 |
| I-759 |
| Kentucky |
| I-264 |
| Virginia |
| I-264 |
| I-464 |
| I-564 |
| I-664 |
| Alabama |
| I-165 |
| I-565 |
| Indiana |
| I-465 |
| I-865 |
| Indiana-Kentucky |
| I-265 |
| Kentucky |
| I-165 |
| Indiana |
| I-469 |
| Kentucky |
| I-169 |
| Mississippi-Tennessee |
| I-269 |
| Texas |
| I-169 |
| I-369 |
| Colorado |
| I-270 |
| Illinois-Missouri |
| I-270 |
| Kansas |
| I-470 |
| Kansas-Missouri |
| I-670 |
| Maryland |
| I-270 |
| I-270 Spur |
| I-370 |
| Missouri |
| I-170 |
| I-470 |
| Ohio |
| I-270 |
| I-670 |
| Ohio-West Virginia |
| I-470 |
| Kentucky-Ohio |
| I-471 |
| Ohio |
| I-271 |
| Illinois |
| I-172 |
| Illinois |
| I-474 |
| Florida |
| I-175 |
| I-275 |
| I-375 |
| Georgia |
| I-475 |
| I-575 |
| I-675 |
| Indiana-Kentucky-Ohio |
| I-275 |
| Michigan |
| I-275 |
| I-375 |
| I-475 |
| I-675 |
| Ohio |
| I-475 |
| I-675 |
| Tennessee |
| I-275 |
| Pennsylvania |
| I-176 |
| I-276 |
| I-376 |
| I-476 |
| Pennsylvania-New Jersey |
| I-676 |
| North Carolina |
| I-277 |
| Ohio |
| I-277 |
| New Jersey-New York |
| I-278 |
| New York |
| I-678 |
| Pennsylvania |
| I-279 |
| I-579 |
| California |
| I-280 |
| I-380 |
| I-580 |
| I-680 |
| I-880 |
| I-980 |
| Illinois |
| I-180 |
| Illinois-Iowa |
| I-280 |
| Iowa |
| I-380 |
| I-880 |
| Iowa-Nebraska |
| I-480 |
| I-680 |
| Nebraska |
| I-180 |
| Nevada |
| I-580 |
| New Jersey |
| I-280 |
| Ohio |
| I-280 |
| I-480 |
| I-680 |
| Pennsylvania |
| I-180 |
| I-380 |
| Wyoming |
| I-180 |
| New York |
| I-481 |
| I-781 |
| Virginia |
| I-381 |
| I-581 |
| Washington |
| I-182 |
| Pennsylvania |
| I-283 |
| Connecticut |
| I-384 |
| Connecticut-New York |
| I-684 |
| Idaho |
| I-184 |
| Georgia |
| I-185 |
| I-285 |
| I-985 |
| North Carolina |
| I-285 |
| I-485 |
| I-785 |
| South Carolina |
| I-185 |
| I-385 |
| I-585 |
| New Jersey-New York |
| I-287 |
| New York |
| I-587 |
| I-787 |
| Vermont |
| I-189 |
| Illinois |
| I-190 |
| I-290 |
| Massachusetts |
| I-190 |
| I-290 |
| New York |
| I-190 |
| I-290 |
| I-390 |
| I-490 |
| I-590 |
| I-690 |
| I-790 |
| I-890 |
| I-990 |
| Ohio |
| I-490 |
| South Dakota |
| I-190 |
| Connecticut |
| I-291 |
| I-691 |
| Massachusetts |
| I-291 |
| I-391 |
| New Hampshire |
| I-293 |
| I-393 |
| Illinois |
| I-294 |
| Michigan |
| I-194 |
| Minnesota |
| I-394 |
| I-494 |
| I-694 |
| Wisconsin |
| I-794 |
| I-894 |
| Connecticut-Massachusetts |
| I-395 |
| Delaware |
| I-495 |
| Delaware-New Jersey |
| I-295 |
| District of Columbia |
| I-695 |
| District of Columbia-Maryland |
| I-295 |
| District of Columbia-Maryland-Virginia |
| I-495 |
| District of Columbia-Virginia |
| I-395 |
| Florida |
| I-195 |
| I-295 |
| I-395 |
| I-595 |
| Maine |
| I-195 |
| I-295 |
| I-395 |
| Maryland |
| I-195 |
| I-395 |
| I-695 |
| I-795 |
| I-895 |
| Massachusetts |
| I-495 |
| Massachusetts-Rhode Island |
| I-195 |
| I-295 |
| New Jersey-Pennsylvania |
| I-195 |
| New York |
| I-295 |
| I-495 |
| I-695 |
| I-895 |
| North Carolina |
| I-295 |
| I-795 |
| Virginia |
| I-195 |
| I-295 |
| Michigan |
| I-196 |
| I-296 |
| I-696 |
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