Alabama
edit| Shield | Highway | Notes |
|---|---|---|
| I-10 | ||
| I-14 | Proposed extension into Alabama | |
| I-20 | ||
| I-22 | ||
| I-59 | ||
| I-63 | Proposed; number not definite | |
| I-65 | ||
| I-85 | ||
| I-110 | Former proposed extension into Alabama | |
| I-165 | ||
| I-210 | Former proposed number for what is now I-165 | |
| I-222 | Proposed | |
| I-359 | ||
| I-422 | Proposed | |
| I-459 | ||
| I-565 | ||
| I-685 | Proposed | |
| I-759 | ||
| US 11 | ||
| US 13 | Cancelled extension into Alabama | |
| US 29 | ||
| US 31 | ||
| US 43 | ||
| US 45 | ||
| US 72 | ||
| US 78 | ||
| US 78S | Decommissioned | |
| US 78N | Decommissioned | |
| US 80 | ||
| US 82 | ||
| US 84 | ||
| US 86 | Former proposed number for part of what is now US 84 | |
| US 90 | ||
| US 98 | ||
| US 231 | ||
| US 241 | Decommissioned | |
| US 278 | ||
| US 280 | ||
| US 331 | Decommissioned | |
| US 331 | ||
| US 378 | Cancelled extension into Alabama | |
| US 411 | ||
| US 431 |
Alaska
editArizona
edit| Shield | Highway | Notes |
|---|---|---|
| I-8 | ||
| I-10 | ||
| I-11 | Proposed extension into Arizona | |
| I-15 | ||
| I-17 | ||
| I-19 | ||
| I-40 | ||
| I-66 | Former proposal | |
| I-66 | Former number for a proposed renumbering of I-40 | |
| I-410 | Decommissioned | |
| I-510 | Decommissioned | |
| I-710 | Former proposal | |
| US 55 | Former proposal | |
| US 60 | Former proposed number for what became US 66 | |
| US 60 | ||
| US 60X | Unsigned | |
| US 62 | Cancelled extension into Arizona | |
| US 64 | ||
| US 66 | Decommissioned | |
| US 70 | Decommissioned | |
| US 70 | ||
| US 80 | Decommissioned in Arizona | |
| US 87 | Former proposal (two proposals; both cancelled) | |
| US 87W | Former proposal | |
| US 87E | Former proposal | |
| US 89 | ||
| US 90 | Cancelled extension into Arizona | |
| US 91 | Decommissioned in Arizona | |
| US 93 | ||
| US 95 | ||
| US 160 | ||
| US 163 | ||
| US 164 | Decommissioned | |
| US 180 | Decommissioned | |
| US 180 | ||
| US 191 | ||
| US 193 | Former proposed number for parts of SR 84, SR 87, & SR 187 | |
| US 260 | Decommissioned | |
| US 280 | Former proposal | |
| US 380 | Former proposal | |
| US 466 | Decommissioned | |
| US 666 | Decommissioned | |
| US 789 | Former proposal |
Arkansas
edit| Shield | Highway | Notes |
|---|---|---|
| I-29 | Former proposal | |
| I-30 | ||
| I-40 | ||
| I-42 | Proposed | |
| I-49 eventually twice | Separated by Texas | |
| I-55 | ||
| I-57 | ||
| I-69 | Proposed extension into Arkansas | |
| I-130 | Former proposal | |
| I-430 | ||
| I-440 | ||
| I-530 | ||
| I-540 | ||
| I-555 | ||
| I-630 | ||
| I-730 | Former proposed number for AR 226, had I-30 been extended to the northeastern part of the state | |
| US 49 | ||
| US 59 | ||
| US 61 | ||
| US 62 | ||
| US 63 | ||
| US 64 | ||
| US 65 | ||
| US 67 | ||
| US 67W | Decommissioned | |
| US 67W | Decommissioned | |
| US 67W | Decommissioned | |
| US 67E | Decommissioned | |
| US 67E | Decommissioned | |
| US 67E | Decommissioned | |
| US 70 | ||
| US 71 twice | Separated by Texas | |
| US 78 | Cancelled extension into Arkansas, but has since been extended | |
| US 79 | ||
| US 82 | ||
| US 165 | ||
| US 167 | ||
| US 270 | ||
| US 271 | ||
| US 278 | ||
| US 371 | ||
| US 412 | ||
| US 425 |
California
edit| Shield | Highway | Notes |
|---|---|---|
| I-5 | ||
| I-5W | Decommissioned | |
| I-5E | Decommissioned | |
| I-7 | Proposed | |
| I-8 | ||
| I-9 | Proposed | |
| I-10 | ||
| I-15 | ||
| I-15 Temp. | Decommissioned | |
| I-15 Temp. | Decommissioned | |
| I-15 Temp. | Decommissioned | |
| I-15 Temp. | Decommissioned | |
| I-15E | Decommissioned | |
| I-15E Temp. | Decommissioned | |
| I-15W | Decommissioned | |
| I-15W Temp. | Decommissioned | |
| I-40 | ||
| I-66 | Former number for a proposed renumbering of parts of I-10 and I-15 | |
| I-66 | Former proposal | |
| I-80 | ||
| I-105 | Decommissioned | |
| I-105 | ||
| I-110 | Decommissioned | |
| I-110 | ||
| I-180 | Former proposed number for the Richmond–San Rafael Bridge | |
| I-205 | ||
| I-210 | ||
| I-215 | ||
| I-238 | ||
| I-280 | ||
| I-305 | Unsigned | |
| I-380 | ||
| I-405 | ||
| I-480 | Decommissioned | |
| I-505 | ||
| I-580 | ||
| I-605 | ||
| I-680 | ||
| I-710 | ||
| I-780 | ||
| I-805 | ||
| I-880 | Decommissioned | |
| I-880 | ||
| I-905 | Proposed | |
| I-980 | ||
| US 6 | ||
| US 40 | Decommissioned in California | |
| US 42 | Former proposed number for what became US 48 | |
| US 48 | Decommissioned | |
| US 48N | Former proposal | |
| US 50 | ||
| US 60 | Former proposed number for what became US 66 | |
| US 60 | Decommissioned in California | |
| US 62 | Cancelled extension into California | |
| US 64 | Cancelled extension into California | |
| US 66 | Decommissioned | |
| US 70 | Decommissioned in California | |
| US 80 | Decommissioned in California | |
| US 90 | Cancelled extension into California | |
| US 91 | Decommissioned in California | |
| US 95 | ||
| US 97 | ||
| US 99 | Decommissioned | |
| US 99W | Decommissioned | |
| US 99W | Decommissioned | |
| US 99E | Decommissioned | |
| US 99E | Decommissioned | |
| US 101 | ||
| US 101W | Decommissioned | |
| US 101W | Decommissioned | |
| US 101E | Decommissioned | |
| US 101E | Decommissioned | |
| US 199 | ||
| US 299 | Decommissioned | |
| US 395 twice | Separated by Nevada | |
| US 399 | Decommissioned | |
| US 466 | Decommissioned | |
Colorado
edit| Shield | Highway | Notes |
|---|---|---|
| I-25 | ||
| I-25E | Former proposed number for what is now I-225 & I-270 | |
| I-70 | ||
| I-76 | ||
| I-80S | Decommissioned | |
| I-225 | ||
| I-270 | ||
| I-425 | Former proposed number for what is now I-270 | |
| I-470 | Former proposed number for SH 470, E-470, & the Northwest Parkway | |
| US 6 | ||
| US 24 | ||
| US 34 | ||
| US 36 | ||
| US 38 | Decommissioned | |
| US 40 | ||
| US 40S | Decommissioned; shield | |
| US 40N | Decommissioned | |
| US 46 | Former proposal; shield | |
| US 50 | ||
| US 78 | Cancelled extension into Colorado | |
| US 84 | ||
| US 85 | ||
| US 87 | ||
| US 136 | Possible cancelled extension into Colorado | |
| US 138 | ||
| US 160 | ||
| US 164 | Decommissioned | |
| US 285 | Decommissioned | |
| US 285 | ||
| US 287 | ||
| US 340 | Former proposal | |
| US 350 | ||
| US 385 | ||
| US 400 | ||
| US 450 | Decommissioned | |
| US 491 | ||
| US 550 | ||
| US 560 | Former proposal | |
| US 650 | Former proposal | |
| US 666 | Decommissioned | |
| US 789 | Former proposal |
Connecticut
edit| Shield | Highway | Notes |
|---|---|---|
| I-84 | ||
| I-86 | Decommissioned | |
| I-87 | Former proposed number for what is now I-684; it was a cancelled portion of I-87. | |
| I-89 | Former proposal | |
| I-91 | ||
| I-95 | ||
| I-284 | Former proposal | |
| I-291 | ||
| I-384 | ||
| I-395 | ||
| I-484 | Former proposed number for the Conland–Whitehead Highway | |
| I-491 | Former proposed number for Route 3 | |
| I-495 | Cancelled extension into Connecticut | |
| I-684 | ||
| I-691 | ||
| I-891 | Proposed | |
| US 1 | ||
| US 5 | ||
| US 6 | ||
| US 7 | ||
| US 44 | ||
| US 202 |
Delaware
edit| Shield | Highway | Notes |
|---|---|---|
| I-95 | ||
| I-99 | Former proposal | |
| I-195 | Former proposed number for part of I-95 | |
| I-295 | ||
| I-395 | Former proposed number for part of I-95 | |
| I-495 | ||
| I-595 | Former proposed number for part of I-95 | |
| I-895 | Temporary designation for I-95 while that highway was being reconstructed (1979-1980) | |
| US 9 | ||
| US 13 | ||
| US 40 | ||
| US 113 | ||
| US 122 | Decommissioned | |
| US 202 | ||
| US 301 | ||
| US 301S | Decommissioned | |
| US 301N | Decommissioned |
District of Columbia
edit| Shield | Highway | Notes |
|---|---|---|
| I-66 | ||
| I-66N | Former proposed number for what would later be re-proposed as I-266 | |
| I-70S | Cancelled extension into the District of Columbia | |
| I-95 | ||
| I-195 | Proposed | |
| I-266 | Former proposed number for what was Canal Road & Whitehurst Freeway | |
| I-270 | Cancelled extension into the District of Columbia | |
| I-295 | ||
| I-395 | ||
| I-495 | ||
| I-695 | ||
| US 1 | ||
| US 29 | ||
| US 50 | ||
| US 211 | Decommissioned in the District of Columbia | |
| US 240 | Decommissioned |
Florida
edit| Shield | Highway | Notes |
|---|---|---|
| I-4 | ||
| I-10 | ||
| I-75 | ||
| I-75E | Former proposed number for what would later be proposed as I-75W | |
| I-75W | Former proposed number for part of what is now I-75 | |
| I-95 | ||
| I-110 | ||
| I-175 | ||
| I-185 | Cancelled extension into Florida | |
| I-195 | ||
| I-275 | ||
| I-295 | ||
| I-375 | ||
| I-395 | ||
| I-595 | ||
| I-795 | Proposed | |
| US 1 | ||
| US 5 | Cancelled extension into Florida | |
| US 17 | ||
| US 19 | ||
| US 23 | ||
| US 27 | ||
| US 29 | ||
| US 33 | Former proposal | |
| US 41 | ||
| US 90 | ||
| US 92 | ||
| US 94 | Decommissioned | |
| US 98 | ||
| US 129 | ||
| US 192 | ||
| US 221 | ||
| US 231 | ||
| US 301 | ||
| US 319 | ||
| US 331 | Decommissioned | |
| US 331 | ||
| US 431 | Cancelled extension into Florida | |
| US 441 | ||
| US 541 | Decommissioned |
Georgia
edit| Shield | Highway | Notes |
|---|---|---|
| I-3 | Proposed | |
| I-14 | Proposed extension into Georgia | |
| I-16 | ||
| I-20 | ||
| I-24 | ||
| I-59 | ||
| I-75 | ||
| I-85 | ||
| I-95 | ||
| I-175 | Former proposal | |
| I-185 | ||
| I-285 | ||
| I-420 | Former proposed number for part of SR 166 | |
| I-475 | ||
| I-485 | Former proposal | |
| I-516 | ||
| I-520 | ||
| I-575 | ||
| I-675 | ||
| I-985 | ||
| US 1 | ||
| US 5 | Cancelled extension into Georgia | |
| US 11 | ||
| US 13 | Cancelled extension into Georgia | |
| US 17 | ||
| US 19 | ||
| US 23 | ||
| US 25 | ||
| US 27 | ||
| US 29 | ||
| US 33 | Former proposal | |
| US 41 | ||
| US 41W | Decommissioned | |
| US 41E | Decommissioned | |
| US 41E | Decommissioned | |
| US 76 | ||
| US 78 | ||
| US 78S | Decommissioned | |
| US 78N | Decommissioned | |
| US 80 | ||
| US 82 | ||
| US 84 | ||
| US 123 | ||
| US 129 | ||
| US 270 | Former proposal | |
| US 278 | ||
| US 280 | ||
| US 301 | ||
| US 319 | ||
| US 341 | ||
| US 378 | ||
| US 411 | ||
| US 441 |
Hawaii
editIdaho
edit| Shield | Highway | Notes |
|---|---|---|
| I-11 | Possible extension into Idaho | |
| I-15 | shield | |
| I-15W | Decommissioned; shield | |
| I-80N | Decommissioned; shield | |
| I-82 | Former proposed number for the renumbering of I-80N | |
| I-82N | Former proposed number for what became I-15W | |
| I-84 | shield | |
| I-86 | shield | |
| I-90 | ||
| I-180N | Former proposed number for what is now I-184 | |
| I-184 | ||
| US-2 | ||
| US-8 | Cancelled extension into Idaho | |
| US-10 | Decommissioned in Idaho | |
| US-12 | ||
| US-14 | Cancelled extension into Idaho | |
| US-20 | ||
| US-26 | ||
| US-30 | ||
| US-30S | Decommissioned | |
| US-30N | Decommissioned | |
| US-30N | Decommissioned | |
| US-84 | Cancelled extension into Idaho | |
| US-89 | ||
| US-91 | ||
| US-93 | ||
| US-95 was twice | Separated by Washington, which was decommissioned | |
| US-95W | Decommissioned | |
| US-95E | Decommissioned | |
| US-136 | Cancelled extension into Idaho | |
| US-191 | Decommissioned in Idaho | |
| US-195 was twice | Separated by Washington; northern segment in Idaho was decommissioned. | |
| US-287 | Decommissioned in Idaho | |
| US-410 | Decommissioned | |
| US-530 | Former proposed number for either US-30 and/or US-30S | |
| US-630 | Decommissioned |
Illinois
edit| Shield | Highway | Notes |
|---|---|---|
| I-24 | ||
| I-37 | Former proposed number for part of I-155 | |
| I-39 | shield | |
| I-41 | ||
| I-53 | Former proposal | |
| I-55 | shield | |
| I-57 | ||
| I-64 | ||
| I-66 | Former number for a proposed renumbering of I-55 | |
| I-66 | Former proposal | |
| I-70 | ||
| I-72 | shield | |
| I-74 | ||
| I-80 | shield | |
| I-88 | ||
| I-90 | ||
| I-94 | shield | |
| I-155 | ||
| I-172 | Decommissioned | |
| I-172 | ||
| I-174 | Former number for a proposed renumbering of I-74 | |
| I-180 | ||
| I-190 | ||
| I-255 | ||
| I-270 | shield | |
| I-274 | Former number for a proposed renumbering of I-80 | |
| I-280 | ||
| I-290 | shield | |
| I-294 | ||
| I-355 | ||
| I-455 | Former proposed number for what is now I-355 | |
| I-474 | ||
| I-490 | Proposed | |
| I-494 | Former proposed number for Lake Shore Drive | |
| I-494 | Former proposed number for the Crosstown Expressway | |
| I-694 | Former proposed number for Lake Shore Drive | |
| I-870 | Former number for a proposed renumbering of I-270 | |
| US 6 | ||
| US 12 | ||
| US 14 | ||
| US 20 | ||
| US 24 | ||
| US 26 | Cancelled extension into Illinois | |
| US 30 | ||
| US 32 | Decommissioned | |
| US 33 | Former proposal | |
| US 34 | ||
| US 36 | ||
| US 40 | ||
| US 41 | ||
| US 45 | ||
| US 50 | ||
| US 51 | ||
| US 52 | ||
| US 54 | ||
| US 58 | Cancelled extension into Illinois | |
| US 60 | Former proposed number for what became US 66 | |
| US 60 | ||
| US 60E | Former proposed number for the current US 60 | |
| US 60N | Former proposed number for US 66 | |
| US 61 | Temporarily routed into Illinois when the Eagle Point Bridge was closed | |
| US 62 | Former proposed number for what is now US 60 | |
| US 62 | ||
| US 66 | Decommissioned | |
| US 67 | ||
| US 124 | Decommissioned | |
| US 136 | ||
| US 150 | ||
| US 151 | Temporarily routed into Illinois when the Eagle Point Bridge was closed | |
| US 251 | Former proposal | |
| US 330 | Decommissioned | |
| US 430 | Decommissioned | |
| US 460 | Decommissioned in Illinois | |
Indiana
edit| Shield | Highway | Notes |
|---|---|---|
| I-64 | ||
| I-65 | ||
| I-67 | Former proposal | |
| I-67 | Proposed | |
| I-67 | Proposed | |
| I-69 | ||
| I-70 | ||
| I-74 | shield | |
| I-80 | shield | |
| I-90 | ||
| I-94 | ||
| I-164 | Decommissioned, but may still exist as an unsigned highway. | |
| I-165 | Former proposal | |
| I-265 | ||
| I-275 | shield | |
| I-294 | Decommissioned in Indiana; later, a proposal to re-extend it into the state was cancelled. | |
| I-465 | ||
| I-469 | ||
| I-665 | Former proposed number for what would become I-865 | |
| I-865 | ||
| US 4 | Former proposal | |
| US 6 | ||
| US 12 | ||
| US 20 | ||
| US 24 | ||
| US 26 | Cancelled extension into Indiana | |
| US 27 | ||
| US 30 | ||
| US 31 | ||
| US 31W | Decommissioned in Indiana | |
| US 31E | Decommissioned in Indiana | |
| US 33 | Former proposal | |
| US 33 | ||
| US 35 | ||
| US 36 | ||
| US 37 | Former proposal | |
| US 40 | ||
| US 41 | ||
| US 50 | ||
| US 52 | ||
| US 110 | Former proposal | |
| US 112 | Decommissioned | |
| US 112S | Decommissioned | |
| US 131 | ||
| US 136 | ||
| US 150 | ||
| US 152 | Decommissioned | |
| US 224 | ||
| US 231 | ||
| US 421 | ||
| US 460 | Decommissioned in Indiana | |
| US 641 | Decommissioned in Indiana |
Iowa
edit| Shield | Highway | Notes | |
|---|---|---|---|
| I-29 | |||
| I-35 | |||
| I-74 | |||
| I-80 | |||
| I-80N | Decommissioned | ||
| I-129 | |||
| I-174 | Former number for a proposed renumbering of I-74 | ||
| I-235 | |||
| I-274 | Former number for a proposed renumbering of I-80 | ||
| I-280 | Decommissioned | ||
| I-280 | |||
| I-335 | Proposed | ||
| I-380 | |||
| I-480 | |||
| I-680 | |||
| I-880 | |||
| US 6 | |||
| US 18 | |||
| US 20 | |||
| US 26 | Cancelled extension into Iowa | ||
| US 30 | |||
| US 30S | Decommissioned | ||
| US 32 | Decommissioned | ||
| US 34 | |||
| US 52 | |||
| US 55 | Decommissioned | ||
| US 55 | Former proposal | ||
| US 59 | |||
| US 61 | |||
| US 63 | |||
| US 65 | |||
| US 67 | |||
| US 69 | |||
| US 71 | |||
| US 73 | Cancelled extension into Iowa | ||
| US 75 | |||
| US 77 | |||
| US 136 | |||
| US 151 | |||
| US 161 | Decommissioned | ||
| US 163 | Decommissioned | ||
| US 169 | |||
| US 218 | |||
| US 275 |
Kansas
edit| Shield | Highway | Notes |
|---|---|---|
| I-35 | ||
| I-35W | Decommissioned | |
| I-66 | Former proposal | |
| I-70 | ||
| I-135 | ||
| I-235 | ||
| I-335 | ||
| I-435 | ||
| I-470 | ||
| I-635 | ||
| I-670 | ||
| US-24 | ||
| US-36 | ||
| US-40 | ||
| US-40S | Decommissioned | |
| US-40N | Decommissioned | |
| US-50 | ||
| US-50S | Decommissioned | |
| US-50N | Decommissioned | |
| US-54 | ||
| US-55 | Former proposal | |
| US-56 | ||
| US-59 | ||
| US-60 | Former proposed number for what became US-66 | |
| US-66 | Decommissioned | |
| US-69 | ||
| US-73 | ||
| US-73W | Decommissioned | |
| US-73E | Decommissioned | |
| US-75 | ||
| US-77 | ||
| US-78 | Cancelled extension into Kansas | |
| US-81 | ||
| US-83 | ||
| US-154 | Decommissioned | |
| US-155 | Former proposed number for what became US-156 | |
| US-156 | Decommissioned | |
| US-159 | ||
| US-160 | ||
| US-166 | ||
| US-169 | ||
| US-177 | ||
| US-183 | ||
| US-250 | Former proposal | |
| US-270 | ||
| US-281 | ||
| US-283 | ||
| US-340 | Former proposal | |
| US-383 | Decommissioned | |
| US-400 |
Kentucky
edit| Shield | Highway | Notes |
|---|---|---|
| I-24 | ||
| I-64 | ||
| I-65 | shield | |
| I-66 | Former proposal | |
| I-67 | Proposed | |
| I-69 | ||
| I-71 | ||
| I-74 | Possible extension into Kentucky | |
| I-75 | shield | |
| I-165 | ||
| I-169 | ||
| I-175 | Former proposal | |
| I-264 | ||
| I-265 | ||
| I-275 | ||
| I-365 | Proposed | |
| I-369 | Former proposed number for what is now proposed as I-569 | |
| I-471 | ||
| I-565 | Former proposed number for what is now I-165 | |
| I-569 | Proposed | |
| US 23 | ||
| US 25 | ||
| US 25W | ||
| US 25E | ||
| US 27 | ||
| US 31 | ||
| US 31W | ||
| US 31E | ||
| US 33 | Former proposal | |
| US 37 | Former proposal | |
| US 41 | ||
| US 41W | Decommissioned | |
| US 41E | Decommissioned | |
| US 42 | ||
| US 43 | Decommissioned in Kentucky | |
| US 45 | ||
| US 51 | ||
| US 52 twice | Separated by West Virginia | |
| US 58 | Cancelled extension into Kentucky | |
| US 60 | ||
| US 60E | Former proposed number for US 60 | |
| US 62 | ||
| US 68 | ||
| US 79 | ||
| US 80 | Former proposal | |
| US 119 three times | Separated by West Virginia | |
| US 123 | Decommissioned | |
| US 127 | ||
| US 143 | Former proposal | |
| US 150 | ||
| US 168 | Decommissioned | |
| US 227 | Decommissioned | |
| US 231 | ||
| US 241 | Decommissioned | |
| US 421 | ||
| US 431 | ||
| US 460 | ||
| US 641 |
Louisiana
edit| Shield | Highway | Notes |
|---|---|---|
| I-10 | ||
| I-12 | ||
| I-14 | Possible extension into Louisiana | |
| I-20 | shield | |
| I-29 | Former proposal | |
| I-49 | ||
| I-55 | ||
| I-59 | ||
| I-69 | Proposed extension into Louisiana | |
| I-110 | ||
| I-210 | shield | |
| I-220 | shield | |
| I-310 | Former proposed number for the never-built Vieux Carré Riverfront Expressway | |
| I-310 | ||
| I-410 | Former proposed number for the Airline Highway | |
| I-410 | Former proposal | |
| I-410 | Former proposal | |
| I-420 | Former proposal | |
| I-510 | ||
| I-610 | shield | |
| I-910 | Unsigned | |
| US 11 | ||
| US 13 | Cancelled extension into Louisiana | |
| US 51 | ||
| US 61 | ||
| US 63 | ||
| US 65 | ||
| US 71 | ||
| US 79 | ||
| US 80 | ||
| US 84 | ||
| US 90 | ||
| US 98 | Cancelled extension into Louisiana | |
| US 165 | ||
| US 167 | ||
| US 171 | ||
| US 190 | ||
| US 371 | ||
| US 425 | ||
| US 427 | Former proposal |
Maine
editMaryland
edit| Shield | Highway | Notes |
|---|---|---|
| I-68 | Former proposed number for what became the original I-595 | |
| I-68 | ||
| I-70 | ||
| I-70S | Former proposed number for what is now I-270 | |
| I-70N | Former proposed number for what is now I-70 | |
| I-81 | ||
| I-83 | ||
| I-95 | ||
| I-97 | ||
| I-99 | Former proposal | |
| I-99 | Proposed extension into Maryland | |
| I-170 | Former proposal | |
| I-195 | ||
| I-197 | Former proposed number for part of the John Hanson Highway | |
| I-270 | ||
| I-270Y | Unsigned | |
| I-295 | ||
| I-297 | Former proposed number for part of Maryland Route 3 | |
| I-370 | ||
| I-395 | ||
| I-395A | Unsigned | |
| I-495 | ||
| I-495X | Unsigned | |
| I-595 | Former proposal | |
| I-595 | Unsigned | |
| I-695 | ||
| I-795 | ||
| I-895 | ||
| I-895A | Unsigned | |
| I-895B | Unsigned | |
| US 1 | ||
| US 5 | Cancelled extension into Maryland | |
| US 11 | ||
| US 13 | ||
| US 13A | Unsigned | |
| US 15 | ||
| US 15A | Unsigned | |
| US 15B | Unsigned | |
| US 15G | Unsigned | |
| US 29 | ||
| US 40 | ||
| US 48 | Decommissioned | |
| US 50 twice | Separated by Virginia and the District of Columbia | |
| US 50PA | Unsigned | |
| US 50QB | Unsigned | |
| US 50QC | Unsigned | |
| US 50UA | Unsigned | |
| US 50WA | Unsigned | |
| US 50WB | Unsigned | |
| US 50WC | Unsigned | |
| US 111 | Decommissioned | |
| US 113 | ||
| US 140 | Decommissioned | |
| US 213 | Decommissioned | |
| US 219 | ||
| US 219A | Unsigned | |
| US 219B | Unsigned | |
| US 219C | Unsigned | |
| US 219D | Unsigned | |
| US 219E | Unsigned | |
| US 219F | Unsigned | |
| US 219G | Unsigned | |
| US 219J | Unsigned | |
| US 220 | ||
| US 222 | ||
| US 240 | Decommissioned | |
| US 301 | ||
| US 340 | ||
| US 522 | ||
| US 522A | Decommissioned unsigned highway | |
| US 522B | Unsigned | |
| US 522C | Unsigned | |
| US 622 | Decommissioned |
Massachusetts
editMichigan
edit| Shield | Highway | Notes |
|---|---|---|
| I-67 | Former proposal | |
| I-67 | Former proposed number for what is now I-196 | |
| I-67 | Proposed | |
| I-69 | ||
| I-69 Temp. | Decommissioned | |
| I-73 | Former proposed number for what is now I-275 | |
| I-73 | Proposed extension into Michigan | |
| I-75 | shield | |
| I-77 | Cancelled in Michigan | |
| I-92 | Former proposed number for part of what is now I-94 | |
| I-94 | shield | |
| I-94N | Former proposed number for part of what is now I-96 | |
| I-96 | ||
| I-98 | Former proposed number for what is now I-696 | |
| I-175 | Former proposed number for what is now I-475 | |
| I-194 | ||
| I-196 | shield | |
| I-275 | Former proposed number for what is now I-675 | |
| I-275 | ||
| I-296 | Former proposed number for what is now I-496 | |
| I-296 | Unsigned (previously signed) | |
| I-375 | ||
| I-475 | ||
| I-496 | ||
| I-675 | ||
| I-696 | shield | |
| US 2 twice | Separated by Wisconsin | |
| US 8 | ||
| US 10 | ||
| US 12 | ||
| US 16 | Decommissioned in Michigan | |
| US 23 | ||
| US 24 | ||
| US 25 | Decommissioned in Michigan | |
| US 27 | Decommissioned in Michigan | |
| US 31 | ||
| US 33 | Decommissioned in Michigan | |
| US 41 | ||
| US 45 | ||
| US 102 | Decommissioned | |
| US 110 | Former proposal | |
| US 112 | Decommissioned | |
| US 127 | ||
| US 131 | ||
| US 141 twice | Separated by Wisconsin | |
| US 223 |
Minnesota
edit| Shield | Highway | Notes |
|---|---|---|
| I-35 | ||
| I-35E | ||
| I-35W | ||
| I-90 | ||
| I-94 | ||
| I-335 | Former proposal | |
| I-394 | ||
| I-494 | ||
| I-535 | ||
| I-694 | ||
| US 2 | ||
| US 8 | ||
| US 10 | ||
| US 10N | Decommissioned | |
| US 10S | Decommissioned | |
| US 12 | ||
| US 14 | ||
| US 16 | Decommissioned in Minnesota | |
| US 52 | ||
| US 53 | ||
| US 55 | Decommissioned | |
| US 59 | Decommissioned | |
| US 59 | ||
| US 61 | ||
| US 63 | ||
| US 65 | ||
| US 69 | ||
| US 71 | ||
| US 73 | Cancelled extension into Minnesota | |
| US 75 | ||
| US 77 | Decommissioned in Minnesota | |
| US 169 | ||
| US 200 | Former proposal | |
| US 208 | Former proposed number for part of what was US 210 | |
| US 210 | Decommissioned | |
| US 212 | ||
| US 218 | ||
| US 261 | Former proposal | |
| US 371 | Decommissioned | |
Mississippi
edit| Shield | Highway | Notes |
|---|---|---|
| I-10 | ||
| I-14 | Proposed extension into Mississippi | |
| I-20 | ||
| I-22 | ||
| I-55 | ||
| I-59 | ||
| I-69 | ||
| I-110 | ||
| I-210 | Former proposed number for what is now proposed as I-310 | |
| I-220 | ||
| I-269 | ||
| I-310 | Proposed | |
| I-755 | Proposed | |
| US 11 | ||
| US 13 | Cancelled extension into Mississippi | |
| US 45 | ||
| US 49 twice | Separated by the current US 49W & US 49E | |
| US 49W | Decommissioned | |
| US 49W | ||
| US 49E | Decommissioned | |
| US 49E | ||
| US 51 | ||
| US 61 | ||
| US 65 | Decommissioned in Mississippi | |
| US 72 | ||
| US 78 | ||
| US 80 | ||
| US 82 | ||
| US 84 | ||
| US 86 | Former proposed number for what is now part of US 84 | |
| US 90 | ||
| US 98 | ||
| US 278 | ||
| US 425 |
Missouri
edit| Shield | Highway | Notes |
|---|---|---|
| I-24 | Cancelled extension into Missouri | |
| I-24W | Former proposed number for what is now I-155 | |
| I-29 | ||
| I-30 | Cancelled extension into Missouri | |
| I-35 | ||
| I-44 | ||
| I-49 | ||
| I-55 | ||
| I-57 | ||
| I-64 | ||
| I-66 | Former number for a proposed renumbering of what was I-44, I-55, I-64, I-70, & US 40 | |
| I-66 | Former proposal | |
| I-70 | ||
| I-72 | ||
| I-144 | Former proposed number for part of what is now I-270 | |
| I-155 | ||
| I-170 | ||
| I-229 | ||
| I-244 | Former proposed number for part of what is now I-270 | |
| I-255 | ||
| I-270 | ||
| I-364 | Possible former proposed number for what is now Route 364 | |
| I-370 | Former proposed number for what is now Route 370 | |
| I-435 | ||
| I-470 | ||
| I-635 | ||
| I-670 | ||
| I-755 | Former proposal | |
| US 24 | ||
| US 36 | ||
| US 40 | ||
| US 50 | ||
| US 54 | ||
| US 55 | Former proposal | |
| US 56 | ||
| US 59 | ||
| US 60 | Former proposed number for what would become US 66 | |
| US 60 | ||
| US 60E | Former proposed number for the current US 60 | |
| US 60N | Former proposed number for US 66 | |
| US 61 | ||
| US 62 | Former proposed number for what is now US 60 | |
| US 62 | ||
| US 63 | ||
| US 65 | ||
| US 66 | Decommissioned | |
| US 67 | ||
| US 69 | ||
| US 71 | ||
| US 73 | Decommissioned in Missouri | |
| US 78 | Cancelled extension into Missouri | |
| US 80 | Former proposal | |
| US 136 | ||
| US 159 | ||
| US 160 | ||
| US 166 | ||
| US 169 | ||
| US 271 | Cancelled extension into Missouri | |
| US 275 | ||
| US 400 | ||
| US 412 | ||
| US 460 | Decommissioned in Missouri |
Montana
edit| Shield | Highway | Notes |
|---|---|---|
| I-15 | ||
| I-90 | ||
| I-94 | ||
| I-115 | ||
| I-315 | Unsigned | |
| US 2 | ||
| US 8 | Cancelled extension into Montana | |
| US 10 | Decommissioned in Montana | |
| US 10S | Decommissioned | |
| US 10N | Decommissioned | |
| US 12 | Was previously proposed in two parts before rerouting | |
| US 20 | ||
| US 87 | ||
| US 87W | Decommissioned | |
| US 87E | Decommissioned | |
| US 89 | ||
| US 91 | Decommissioned in Montana | |
| US 93 | ||
| US 191 twice | Separated by Wyoming | |
| US 200 | Former proposal | |
| US 212 twice | Separated by Wyoming | |
| US 287 | ||
| US 310 | ||
| US 312 twice | Decommissioned; separated by Wyoming | |
| US 789 | Former proposal |
Nebraska
edit| Shield | Highway | Notes |
|---|---|---|
| I-76 | ||
| I-80 | shield | |
| I-80S | Decommissioned | |
| I-129 | ||
| I-180 | ||
| I-280 | Decommissioned | |
| I-480 | shield | |
| I-580 | Decommissioned | |
| I-680 | ||
| US-6 | ||
| US-20 | ||
| US-26 | ||
| US-26N | Decommissioned | |
| US-30 | ||
| US-30S | Decommissioned | |
| US-32 | Decommissioned | |
| US-34 | ||
| US-38 | Decommissioned | |
| US-73 | ||
| US-73W | Decommissioned | |
| US-73E | Decommissioned | |
| US-75 | ||
| US-77 | ||
| US-81 | ||
| US-83 | ||
| US-136 | ||
| US-138 | ||
| US-159 | ||
| US-183 | ||
| US-275 | ||
| US-281 | ||
| US-283 | ||
| US-383 | Decommissioned | |
| US-385 |
Nevada
editNew Hampshire
editNew Jersey
edit| Shield | Highway | Notes |
|---|---|---|
| I-76 | ||
| I-78 | ||
| I-80 | ||
| I-80S | Decommissioned | |
| I-82 | Former proposed number | |
| I-95 | ||
| I-195 | ||
| I-278 | ||
| I-280 | ||
| I-287 | ||
| I-295 | ||
| I-395 | Decommissioned | |
| I-495 | Cancelled extension into New Jersey | |
| I-676 | ||
| I-680 | Decommissioned | |
| I-695 | Former proposed number for part of what is now I-95 | |
| I-895 | Former proposal | |
| US 1 | ||
| US 9 | ||
| US 9W | ||
| US 22 | ||
| US 30 | ||
| US 40 | ||
| US 46 | ||
| US 122 | Decommissioned | |
| US 130 | ||
| US 140 | Former proposal | |
| US 202 | ||
| US 206 | ||
| US 322 | ||
| US 611 | Decommissioned |
New Mexico
edit| Shield | Highway | Notes |
|---|---|---|
| I-10 | ||
| I-25 | ||
| I-40 | ||
| I-66 | Former number for a proposed renumbering of I-40 | |
| I-66 | Former proposal | |
| US 54 | ||
| US 55 | Former proposal | |
| US 56 | ||
| US 60 | Former proposed number for what would become US 66 | |
| US 60 | ||
| US 62 was proposed to be twice | Formerly proposed to have a western extension, but was cancelled | |
| US 64 | ||
| US 66 | Decommissioned | |
| US 70 | ||
| US 80 | Decommissioned in New Mexico | |
| US 82 | ||
| US 84 | ||
| US 85 | ||
| US 87 | ||
| US 90 | Cancelled extension into New Mexico | |
| US 114 | Former proposal | |
| US 160 | ||
| US 164 | Decommissioned | |
| US 180 | Decommissioned | |
| US 180 twice | Separated by Texas | |
| US 260 | Decommissioned | |
| US 285 | ||
| US 360 | Former proposal | |
| US 366 | Decommissioned | |
| US 366 | Decommissioned | |
| US 370 | Former proposal | |
| US 380 | ||
| US 385 | Decommissioned | |
| US 393 | Former proposed number for the renumbering of US 666 | |
| US 412 | ||
| US 460 | Former proposal | |
| US 466 | Former proposal | |
| US 470 | Decommissioned | |
| US 485 | Decommissioned | |
| US 491 | ||
| US 550 | ||
| US 560 | Former proposal | |
| US 566 | Decommissioned | |
| US 570 | Former proposed number | |
| US 666 | Decommissioned | |
| US 789 | Former proposal |
New York
edit| Shield | Highway | Notes |
|---|---|---|
| I-78 | ||
| I-81 | shield | |
| I-82 | Former proposed number | |
| I-83 | Possible cancelled extension into New York | |
| I-84 | ||
| I-86 twice | Separated by Pennsylvania | |
| I-87 | ||
| I-88 | ||
| I-90 | ||
| I-90N | Decommissioned | |
| I-92 | Former proposal | |
| I-92 | Former proposal | |
| I-92 | Proposed | |
| I-95 | shield | |
| I-98 | Proposed | |
| I-99 | ||
| I-187 | Former proposed number for what would become I-487 | |
| I-190 | ||
| I-278 | ||
| I-281 | Decommissioned | |
| I-287 | shield | |
| I-290 | ||
| I-295 | ||
| I-386 | Former proposal | |
| I-390 | ||
| I-478 | Former proposed number for what was the Lower Manhattan Expressway & the Manhattan Bridge | |
| I-478 | Former proposed number for what was the Grand Central Parkway | |
| I-478 | Unsigned | |
| I-481 | ||
| I-487 | Decommissioned | |
| I-487 | Former proposal | |
| I-490 | ||
| I-495 | ||
| I-587 | ||
| I-590 | ||
| I-678 | ||
| I-684 twice | Separated by Connecticut; shield | |
| I-687 | Former proposal | |
| I-690 | ||
| I-695 | ||
| I-781 | ||
| I-787 | ||
| I-790 | ||
| I-878 | Decommissioned | |
| I-878 | Unsigned | |
| I-890 | ||
| I-895 | Decommissioned | |
| I-990 | ||
| US 1 | ||
| US 2 | ||
| US 4 | ||
| US 5 | Cancelled extension into New York | |
| US 6 | ||
| US 6N | Decommissioned | |
| US 7 | Decommissioned in New York | |
| US 9 | ||
| US 9E | Decommissioned | |
| US 9W | ||
| US 11 | ||
| US 11N | Former proposal | |
| US 15 | ||
| US 20 | ||
| US 44 | ||
| US 62 | ||
| US 104 | Decommissioned | |
| US 109 | Decommissioned | |
| US 202 | ||
| US 209 | ||
| US 219 | ||
| US 220 | Decommissioned in New York |
North Carolina
edit| Shield | Highway | Notes |
|---|---|---|
| I-3 | Proposed; possible extension into North Carolina | |
| I-13 | Former proposed number for parts of US 13 & US 17 | |
| I-20 | Cancelled extension into North Carolina | |
| I-26 | ||
| I-36 | Former proposed number for what is now I-42 | |
| I-40 | ||
| I-42 | ||
| I-44 | Former proposed number for what is now I-87 | |
| I-46 | Former proposed number for what is now I-42 | |
| I-50 | Former proposed number for what is now I-87 | |
| I-50 | Former proposed number for what is now I-42 | |
| I-56 | Former proposed number for what is now I-87 | |
| I-73 | ||
| I-74 | ||
| I-77 | ||
| I-83 | Cancelled extension into North Carolina | |
| I-85 | ||
| I-85 Temp. | Decommissioned | |
| I-87 | ||
| I-89 | Former proposed number for what is now I-87 | |
| I-95 | ||
| I-99 | Former proposal | |
| I-140 | Former proposed number for what is now I-240 | |
| I-140 | Former proposed number for part of US 1 | |
| I-140 | ||
| I-185 | Former proposed number for what is now I-285 | |
| I-195 | Former proposed number for what is now I-295 | |
| I-240 | ||
| I-274 | Proposed | |
| I-277 | ||
| I-285 | ||
| I-295 | ||
| I-440 | ||
| I-485 | ||
| I-495 | Decommissioned | |
| I-540 | ||
| I-587 | ||
| I-640 | Former proposed number for what is now I-540 | |
| I-685 | Proposed | |
| I-785 | ||
| I-795 | ||
| I-840 | ||
| I-885 | ||
| US 1 | ||
| US 5 | Cancelled extension into North Carolina | |
| US 13 | ||
| US 15 | ||
| US 17 | ||
| US 19 | ||
| US 19W | ||
| US 19E | ||
| US 21 | ||
| US 23 | ||
| US 25 | ||
| US 29 | ||
| US 33 | Former proposal | |
| US 52 | ||
| US 64 | ||
| US 64E | Former proposal | |
| US 64W | Former proposal | |
| US 70 | ||
| US 74 | ||
| US 76 | ||
| US 117 | Decommissioned | |
| US 117 | ||
| US 121 | Decommissioned | |
| US 129 | ||
| US 158 | ||
| US 170 | Decommissioned | |
| US 176 | ||
| US 178 | ||
| US 217 | Decommissioned | |
| US 220 | ||
| US 221 | ||
| US 258 | ||
| US 264 | ||
| US 270 | Former proposal | |
| US 276 | ||
| US 301 | ||
| US 311 | ||
| US 313 | Former proposal | |
| US 319 | Cancelled extension into North Carolina | |
| US 321 | ||
| US 401 | Decommissioned | |
| US 401 | ||
| US 411 | Decommissioned | |
| US 421 | ||
| US 441 | ||
| US 501 | ||
| US 521 | ||
| US 601 | ||
| US 701 | ||
| US 901 | Former proposal |
North Dakota
edit| Shield | Highway | Notes |
|---|---|---|
| I-29 | ||
| I-31 | Former proposed number for part of what is now I-29 | |
| I-94 | ||
| I-194 | Unsigned | |
| US 2 | ||
| US 2S | Decommissioned | |
| US 2N | Decommissioned | |
| US 8 | Cancelled extension into North Dakota | |
| US 10 | ||
| US 12 | ||
| US 52 | ||
| US 59 | Decommissioned in North Dakota | |
| US 81 | ||
| US 83 | ||
| US 85 | ||
| US 200 | Former proposal | |
| US 281 | ||
| US 281S | Decommissioned | |
| US 385 | Cancelled extension into North Dakota |
Ohio
edit| Shield | Highway | Notes |
|---|---|---|
| I-70 | ||
| I-70A | Decommissioned | |
| I-71 | ||
| I-73 | Proposed extension into Ohio | |
| I-74 | ||
| I-75 | ||
| I-76 | ||
| I-77 | ||
| I-79 | Former proposed number for what is now I-77 | |
| I-80 | ||
| I-80N | Former proposed number for what is now part of I-90, part of I-480, & the entirety of I-490 | |
| I-80S | Decommissioned | |
| I-90 | ||
| I-177 | Former proposed number for part of what is now I-77 | |
| I-270 | ||
| I-271 | ||
| I-275 | ||
| I-277 | ||
| I-280 | ||
| I-290 | Former proposed number for what is now parts of I-490 & I-271 | |
| I-380 | Proposed | |
| I-470 | ||
| I-471 | ||
| I-475 | shield | |
| I-480 | ||
| I-480N | Unsigned | |
| I-490 | ||
| I-670 | ||
| I-675 | ||
| I-680 | ||
| US 4 | Former proposal | |
| US 6 | ||
| US 20 | ||
| US 20S | Decommissioned | |
| US 20N | Decommissioned | |
| US 21 | Decommissioned in Ohio | |
| US 22 | ||
| US 23 | ||
| US 24 | ||
| US 25 | Decommissioned in Ohio | |
| US 27 | ||
| US 30 | ||
| US 30S | Decommissioned | |
| US 30N | Decommissioned | |
| US 33 | Former proposal | |
| US 33 | ||
| US 35 | ||
| US 36 | ||
| US 40 | ||
| US 42 | ||
| US 50 | ||
| US 50S | Decommissioned | |
| US 50N | Decommissioned | |
| US 52 | ||
| US 62 | ||
| US 68 | ||
| US 127 | ||
| US 223 | ||
| US 224 | ||
| US 250 | ||
| US 322 | ||
| US 422 |
Oklahoma
edit| Shield | Highway | Notes |
|---|---|---|
| I-35 | ||
| I-40 | ||
| I-42 | Proposed | |
| I-44 | ||
| I-66 | Former number for a proposed renumbering of I-40 and I-44 | |
| I-66 | Former proposal | |
| I-235 | ||
| I-240 | ||
| I-244 | ||
| I-335 | ||
| I-343 | Proposed | |
| I-344 | ||
| I-440 | Decommissioned | |
| I-444 | Unsigned | |
| File:I-644 (OK).svg | I-644 | Proposed |
| US-54 | ||
| US-55 | Former proposal | |
| US-56 | ||
| US-59 | ||
| US-60 | Former proposed number for what would become US-66 | |
| US-60 | ||
| US-62 | ||
| US-64 | ||
| US-66 | Decommissioned | |
| US-69 | ||
| US-70 | ||
| US-70N | Decommissioned | |
| US-73 | Decommissioned in Oklahoma | |
| US-75 | ||
| US-77 | ||
| US-81 | ||
| US-83 | ||
| US-164 | Decommissioned | |
| US-169 | ||
| US-177 | ||
| US-183 | ||
| US-259 | ||
| US-260 | Former proposal; shield | |
| US-266 | ||
| US-270 | ||
| US-271 | ||
| US-277 | ||
| US-281 | ||
| US-283 | ||
| US-287 | ||
| US-377 | ||
| US-385 | ||
| US-412 |
Oregon
edit| Shield | Highway | Notes |
|---|---|---|
| I-5 | ||
| I-11 | Possible extension into Oregon | |
| I-80N | Decommissioned | |
| I-82 | Former proposed number for the renumbering of I-80N | |
| I-82 | ||
| I-84 | ||
| I-105 | ||
| I-205 | ||
| I-305 | Former proposed number for part of what is now OR 99E Bus. | |
| I-405 | ||
| I-505 | Former proposal | |
| US 12 | Cancelled extension into Oregon | |
| US 14 | Cancelled extension into Oregon | |
| US 14N | Former proposal | |
| US 20 | ||
| US 26 | ||
| US 28 | Decommissioned | |
| US 30 | ||
| US 30S | Decommissioned | |
| US 30N | Decommissioned | |
| US 84 | Cancelled extension into Oregon | |
| US 95 | ||
| US 97 | ||
| US 99 | Decommissioned | |
| US 99W | Decommissioned | |
| US 99E | Decommissioned | |
| US 101 | ||
| US 126 | Decommissioned | |
| US 136 | Cancelled extension into Oregon | |
| US 140 | Former proposal | |
| US 197 | ||
| US 199 | ||
| US 320 | Former proposal | |
| US 395 | ||
| US 420 | Former proposal | |
| US 630 | Decommissioned | |
| US 730 |
Pennsylvania
edit| Shield | Highway | Notes |
|---|---|---|
| I-67 | Proposed | |
| I-70 | ||
| I-70S | Decommissioned | |
| I-76 | ||
| I-78 | ||
| I-79 | ||
| I-80 | ||
| I-80S | Decommissioned | |
| I-80N | Former proposed number for what is now I-78 | |
| I-81 | ||
| I-81E | Decommissioned | |
| I-81S | Former proposed number for what would become I-81E | |
| I-82 | Former proposed number for what would later be proposed as I-81S | |
| I-83 | ||
| I-84 | ||
| I-86 twice | Separated by New York | |
| I-90 | ||
| I-95 | ||
| I-99 | ||
| I-176 | ||
| I-178 | Former proposal | |
| I-179 | Former proposed number for what is now part of I-79 | |
| I-180 | Decommissioned | |
| I-180 | ||
| I-195 | Cancelled extension into Pennsylvania | |
| I-276 | ||
| I-279 | ||
| I-280 | Decommissioned | |
| I-283 | ||
| I-295 | ||
| I-376 | ||
| I-378 | Decommissioned | |
| I-380 | ||
| I-395 | Decommissioned | |
| I-476 | ||
| I-479 | Decommissioned | |
| I-480 | Decommissioned | |
| I-495 | Former proposed number for what would become I-480 | |
| I-495 | Southbound lanes actually begin in Pennsylvania, but officially as a Pennsylvania Route. | |
| I-576 | Proposed | |
| I-579 | ||
| I-676 | ||
| I-680 | Decommissioned | |
| I-695 | Former proposal | |
| I-876 | Decommissioned | |
| I-895 | Former proposal | |
| I-895 | Former proposal | |
| US 1 | ||
| US 5 | Cancelled extension into Pennsylvania | |
| US 6 | ||
| US 6N | Decommissioned | |
| US 6N | ||
| US 11 | ||
| US 13 | ||
| US 15 | ||
| US 19 | ||
| US 20 | ||
| US 22 | ||
| US 30 | ||
| US 40 | ||
| US 46 | Decommissioned in Pennsylvania | |
| US 62 | ||
| US 106 | Decommissioned | |
| US 111 | Decommissioned | |
| US 119 | ||
| US 120 | Decommissioned | |
| US 122 | Decommissioned | |
| US 122 | Decommissioned | |
| US 140 | Decommissioned | |
| US 202 | ||
| US 206 | ||
| US 209 | ||
| US 219 | ||
| US 220 | ||
| US 222 | ||
| US 224 | ||
| US 230 | Decommissioned | |
| US 309 | Decommissioned | |
| US 322 | ||
| US 422 | Split into two parts | |
| US 522 | ||
| US 611 twice | Decommissioned; separated by New Jersey | |
| US 622 | Decommissioned | |
| US 711 | Decommissioned |
Puerto Rico
editRhode Island
editSouth Carolina
edit| Shield | Highway | Notes |
|---|---|---|
| I-3 | Proposed; possible extension into South Carolina | |
| I-14 | Possible extension into South Carolina | |
| I-20 | ||
| I-26 | ||
| I-73 | Proposed extension into South Carolina | |
| I-74 | Proposed extension into South Carolina | |
| I-77 | ||
| I-77 Temp. | Decommissioned | |
| I-85 | ||
| I-95 | ||
| I-99 | Former proposal | |
| I-126 | ||
| I-174 | Former proposed number for what is now the Robert Edge Parkway | |
| I-185 | ||
| I-326 | Decommissioned unsigned highway | |
| I-385 | ||
| I-520 | ||
| I-526 | ||
| I-585 | ||
| I-685 | Former proposed number for I-85 Bus. | |
| US 1 | ||
| US 5 | Cancelled extension into South Carolina | |
| US 13 | Cancelled extension into South Carolina | |
| US 15 | ||
| US 17 | ||
| US 21 | ||
| US 25 | ||
| US 29 | ||
| US 33 | Former proposal | |
| US 52 | ||
| US 76 | ||
| US 78 | ||
| US 117 | Decommissioned in South Carolina | |
| US 123 | ||
| US 158 | Cancelled extension into South Carolina | |
| US 176 | ||
| US 178 | ||
| US 217 | Decommissioned | |
| US 220 | Cancelled extension into South Carolina | |
| US 221 | ||
| US 276 | ||
| US 278 | ||
| US 301 | ||
| US 313 | Former proposal | |
| US 319 | Cancelled extension into South Carolina | |
| US 321 | ||
| US 378 | ||
| US 401 | Decommissioned | |
| US 401 | ||
| US 501 | ||
| US 521 | ||
| US 601 | ||
| US 701 | ||
| US 901 | Former proposal |
South Dakota
editTennessee
edit| Shield | Highway | Notes |
|---|---|---|
| I-3 | Proposed | |
| I-22 | Cancelled in Tennessee | |
| I-24 twice | Separated by Georgia; shield | |
| I-24W | Former proposed number for what is now I-155; had no connection with I-24 | |
| I-26 | ||
| I-40 | ||
| I-55 | ||
| I-65 | ||
| I-69 | Proposed | |
| I-75 | ||
| I-81 | ||
| I-124 | Unsigned | |
| I-126 | Former proposed number for part of the renumbering of I-181 | |
| I-140 | ||
| I-155 | ||
| I-169 | Proposed | |
| I-175 | Former proposal | |
| I-181 | Decommissioned | |
| I-240 | shield | |
| I-255 | Former proposed number for what is now I-40 | |
| I-265 | Decommissioned | |
| I-269 | ||
| I-275 | ||
| I-326 | Proposed | |
| I-440 | ||
| I-475 | Former proposal | |
| I-640 | ||
| I-840 | Original proposal was cancelled, but then re-designated from SR 840 | |
| US 11 | ||
| US 11W | ||
| US 11E | ||
| US 19 | ||
| US 19W | ||
| US 19E | ||
| US 23 | ||
| US 25 | ||
| US 25W | ||
| US 25E | ||
| US 27 | ||
| US 31 | ||
| US 31W | ||
| US 31E | ||
| US 33 | Former proposal | |
| US 37 | Former proposal | |
| US 41 | ||
| US 41W | Decommissioned | |
| US 41W | Decommissioned | |
| US 41E | Decommissioned | |
| US 41E | Decommissioned | |
| US 43 | ||
| US 45 twice | Seperated by US 45W & US 45E | |
| US 45W | ||
| US 45E | ||
| US 51 | ||
| US 58 | ||
| US 61 | ||
| US 63 | Decommissioned in Tennessee | |
| US 64 | ||
| US 70 | ||
| US 70S | ||
| US 70N | ||
| US 72 twice | Separated by Mississippi & Alabama | |
| US 74 | ||
| US 76 | ||
| US 78 | ||
| US 79 | ||
| US 127 | ||
| US 129 | ||
| US 143 | Former proposal | |
| US 231 | ||
| US 241 | Decommissioned | |
| US 241 | Decommissioned | |
| US 270 | Decommissioned | |
| US 321 | ||
| US 411 | Decommissioned | |
| US 411 | ||
| US 412 | ||
| US 421 | ||
| US 431 | ||
| US 441 | ||
| US 511 | Decommissioned | |
| US 641 |
Texas
edit| Shield | Highway | Notes |
|---|---|---|
| I-2 | ||
| I-10 | ||
| I-14 | ||
| I-20 | ||
| I-27 | ||
| I-30 | ||
| I-35 | ||
| I-35E | ||
| I-35W | ||
| I-37 | ||
| I-40 | ||
| I-44 | ||
| I-45 | ||
| I-49 | Exit ramps cross state line. | |
| I-66 | Former number for a proposed renumbering of I-40 | |
| I-69 | ||
| I-69W | ||
| I-69C | ||
| I-69E | ||
| I-110 | ||
| I-169 | ||
| I-214 | Proposed | |
| I-227 | Proposed | |
| I-327 | Proposed | |
| I-345 | Unsigned | |
| I-369 | ||
| I-410 | ||
| I-610 | ||
| I-635 | ||
| I-820 | ||
| US 11 | Cancelled extension into Texas | |
| US 54 twice | Separated by New Mexico | |
| US 57 | ||
| US 59 | ||
| US 60 | Former proposed number for what would become US 66 | |
| US 60 | ||
| US 62 twice | Separated by New Mexico | |
| US 66 | Decommissioned | |
| US 67 | ||
| US 69 | ||
| US 70 | ||
| US 71 | ||
| US 75 | ||
| US 77 | ||
| US 79 | ||
| US 80 | ||
| US 80N | Decommissioned | |
| US 81 | ||
| US 82 | ||
| US 83 | ||
| US 84 | ||
| US 85 | ||
| US 87 | ||
| US 90 | ||
| US 96 | Decommissioned | |
| US 96 | ||
| US 114 | Former proposal | |
| US 164 | Decommissioned | |
| US 175 | ||
| US 180 twice | Separated by New Mexico | |
| US 181 | ||
| US 183 | ||
| US 190 | ||
| US 259 | ||
| US 271 | ||
| US 277 | ||
| US 281 | ||
| US 283 | ||
| US 285 | ||
| US 287 | ||
| US 290 | ||
| US 360 twice | Former proposal; separated by New Mexico | |
| US 366 twice | Decommissioned; separated by New Mexico | |
| US 370 | Decommissioned | |
| US 377 | ||
| US 380 | ||
| US 385 | Decommissioned | |
| US 385 | ||
| US 466 | Former proposal |
Utah
edit| Shield | Highway | Notes |
|---|---|---|
| I-15 | ||
| I-15 Temp. | Decommissioned | |
| I-17 | Proposed extension into Utah | |
| I-70 | ||
| I-80 | ||
| I-80N | Decommissioned | |
| I-82 | Former proposed number for what became I-80N | |
| I-82S | Former proposed number for part of what would become I-80N | |
| I-84 | ||
| I-215 | ||
| I-415 | Former proposed number for what is now I-215 | |
| US-6 | ||
| US-24 | Cancelled extension into Utah | |
| US-30 | Decommissioned in Utah | |
| US-30S | Decommissioned | |
| US-34 | Cancelled extension into Utah | |
| US-40 | ||
| US-50 | ||
| US-84 | Cancelled extension into Utah | |
| US-89 | ||
| US-91 | ||
| US-160 | Decommissioned in Utah | |
| US-163 | Former proposal | |
| US-163 | ||
| US-189 | Decommissioned | |
| US-189 | ||
| US-191 used to be twice | Separated by Wyoming, but the northern Utah segment was decommissioned. | |
| US-330 | Former proposal | |
| US-450 | Decommissioned | |
| US-491 | ||
| US-530 | Decommissioned | |
| US-630 | Former proposal | |
| US-666 | Decommissioned |
Vermont
editVirginia
edit| Shield | Highway | Notes |
|---|---|---|
| I-13 | Former proposed number for parts of US 13 and/or US 17 | |
| I-44 | Former proposed number for what is now I-87's proposed extension into Virginia | |
| I-50 | Former proposed number for what is now I-87's proposed extension into Virginia | |
| I-56 | Former proposed number for what is now I-87's proposed extension into Virginia | |
| I-64 | ||
| I-66 | Former proposal | |
| I-66 | shield | |
| I-66N | Former proposed number for what would later be proposed as I-266 | |
| I-73 | Proposed extension into Virginia | |
| I-74 | Proposed extension into Virginia | |
| I-77 | ||
| I-81 | ||
| I-83 | Cancelled extension into Virginia | |
| I-85 | shield | |
| I-87 | Proposed extension into Virginia | |
| I-89 | Former proposed number for what is now I-87's proposed extension into Virginia | |
| I-95 | ||
| I-99 | Former proposal | |
| I-164 | Former proposal | |
| I-195 | shield | |
| I-264 | ||
| I-266 | Former proposed number for Spout Run Parkway | |
| I-295 | shield | |
| I-381 | ||
| I-395 | ||
| I-464 | ||
| I-495 | shield | |
| I-564 | ||
| I-581 | ||
| I-595 | Former proposed number for part of US 1 | |
| I-664 | ||
| I-785 | Proposed extension into Virginia | |
| I-864 | Former proposal | |
| I-895 | Former proposed number for what is now SR 895, and may become I-895 in the future | |
| US 1 | ||
| US 5 | Cancelled extension into Virginia | |
| US 11 | ||
| US 11W | ||
| US 11E | ||
| US 13 | ||
| US 15 | ||
| US 17 | ||
| US 19 | ||
| US 21 | ||
| US 23 | ||
| US 25E | Decommissioned in Virginia | |
| US 29 | ||
| US 33 | ||
| US 48 | ||
| US 50 | ||
| US 52 | ||
| US 58 | ||
| US 60 | ||
| US 60E | Former proposed number for US 60 | |
| US 117 | Decommissioned | |
| US 121 | Decommissioned | |
| US 121 | Proposed | |
| US 158 | Decommissioned in Virginia | |
| US 170 | Decommissioned | |
| US 211 | ||
| US 219 | ||
| US 220 | ||
| US 221 | ||
| US 250 | ||
| US 258 | ||
| US 301 | Decommissioned | |
| US 301 | ||
| US 311 | Decommissioned in Virginia, but later re-extended into the state | |
| US 319 | Cancelled extension into Virginia | |
| US 321 | Decommissioned in Virginia | |
| US 340 twice | Separated by West Virginia | |
| US 360 | ||
| US 401 | Decommissioned | |
| US 411 | Decommissioned | |
| US 411 | Decommissioned in Virginia | |
| US 421 used to be twice | Was separated by Tennessee, then was re-routed | |
| US 460 twice | Separated by West Virginia | |
| US 501 | ||
| US 511 | Decommissioned | |
| US 522 |
Washington
edit| Shield | Highway | Notes |
|---|---|---|
| I-5 | ||
| I-11 | Possible extension into Washington | |
| I-82 | ||
| I-90 | ||
| I-105 | Former proposed number for what is now I-705 | |
| I-182 | ||
| I-205 | ||
| I-405 | ||
| I-605 | Former proposal | |
| I-605 | Former proposal | |
| I-605 | Former proposal | |
| I-705 | ||
| US 2 | ||
| US 8 | Cancelled extension into Washington | |
| US 10 | Decommissioned in Washington | |
| US 12 | Would have been twice, had the extension into Oregon been designated | |
| US 95 | Decommissioned in Washington | |
| US 97 | ||
| US 99 | Decommissioned | |
| US 101 | ||
| US 195 | ||
| US 197 | ||
| US 295 | Decommissioned | |
| US 395 | ||
| US 410 | Decommissioned | |
| US 420 | Former proposal | |
| US 730 | ||
| US 830 | Decommissioned |
West Virginia
edit| Shield | Highway | Notes |
|---|---|---|
| I-64 | ||
| I-66 | Former proposal | |
| I-68 | ||
| I-70 | ||
| I-73 | Proposed extension into West Virginia | |
| I-74 | Proposed extension into West Virginia | |
| I-77 | ||
| I-79 | ||
| I-81 | ||
| I-268 | Former proposed number for the West Run Expressway | |
| I-470 | ||
| US 11 | ||
| US 19 | ||
| US 21 | Decommissioned in West Virginia | |
| US 22 | ||
| US 30 | ||
| US 33 | ||
| US 35 | ||
| US 40 | ||
| US 48 | Decommissioned | |
| US 48 | ||
| US 50 twice | Separated by Maryland | |
| US 50S | Decommissioned | |
| US 50N | Decommissioned | |
| US 52 three times | Separated by Kentucky each time | |
| US 60 | ||
| US 119 three times | Separated by Kentucky each time | |
| US 121 | Proposed | |
| US 219 | ||
| US 220 | ||
| US 250 | ||
| US 340 | ||
| US 460 | ||
| US 522 |
Wisconsin
edit| Shield | Highway | Notes |
|---|---|---|
| I-39 | ||
| I-41 | ||
| I-43 | ||
| I-47 | Former proposed number for what is now I-41 | |
| I-55 | Cancelled extension into Wisconsin | |
| I-57 | Former proposal | |
| I-90 | ||
| I-94 | ||
| I-535 | ||
| I-594 | Former proposed number for what is now I-41 | |
| I-643 | Former proposed number for what is now I-41 | |
| I-794 | shield | |
| I-894 | shield | |
| US 2 twice | Separated by Michigan | |
| US 8 | ||
| US 10 | ||
| US 12 | ||
| US 14 | ||
| US 16 | Decommissioned in Wisconsin | |
| US 18 | ||
| US 41 | ||
| US 45 | ||
| US 51 | ||
| US 53 | ||
| US 55 | Former proposal | |
| US 61 | ||
| US 63 | ||
| US 110 | Decommissioned | |
| US 112 | Former proposal | |
| US 116 | Former proposal | |
| US 118 | Decommissioned | |
| US 141 twice | Separated by Michigan | |
| US 151 |
Wyoming
edit| Shield | Highway | Notes |
|---|---|---|
| I-25 | ||
| I-80 | ||
| I-90 | ||
| I-180 | ||
| US 12 twice | Former proposed extension into Wyoming | |
| US 14 | ||
| US 16 | ||
| US 18 | ||
| US 20 | ||
| US 26 | ||
| US 30 | ||
| US 30S | Decommissioned | |
| US 30N | Decommissioned | |
| US 85 | ||
| US 85E | Decommissioned | |
| US 87 | ||
| US 87W | Decommissioned | |
| US 87E | Decommissioned | |
| US 89 | ||
| US 116 | Decommissioned; shield | |
| US 120 | Former proposal | |
| US 136 | Cancelled extension into Wyoming | |
| US 163 twice | Former proposal; separated by US 163W & US 163E | |
| US 163W | Former proposal | |
| US 163E | Former proposal | |
| US 185 | Decommissioned; shield | |
| US 187 | Decommissioned | |
| US 189 | ||
| US 191 twice | Separated by a now-decommissioned segment in Utah, a now-decommissioned segment in Idaho, & Montana | |
| US 212 three times | Separated by Montana | |
| US 216 | Decommissioned | |
| US 220 | Former proposal | |
| US 285 | Decommissioned | |
| US 287 | ||
| US 310 | ||
| US 312 | Decommissioned | |
| US 320 | Decommissioned | |
| US 330 | Former proposal | |
| US 420 | Decommissioned; shield | |
| US 530 | Former proposal | |
| US 789 | Former proposal |