U.S. Department of Transportation
Federal Highway Administration
1200 New Jersey Avenue, SE
Washington, DC 20590
202-366-4000
March 3, 2023
Table HM-18
| FUNCTIONAL SYSTEM | FEDERAL-AID HIGHWAYS | NON- FEDERAL-AID HIGHWAYS |
TOTAL | ||||
|---|---|---|---|---|---|---|---|
| NATIONAL HIGHWAY SYSTEM | OTHER | TOTAL | |||||
| INTERSTATE | OTHER | TOTAL | |||||
| Rural: | |||||||
| Principal Arterial: | |||||||
| Interstate | 29,421 | - | 29,421 | - | 29,421 | - | 29,421 |
| Other Freeways and Expressways | - | 6,527 | 6,527 | 29 | 6,556 | - | 6,556 |
| Other | - | 88,678 | 88,678 | 2,753 | 91,431 | - | 91,431 |
| Subtotal | 29,421 | 95,205 | 124,626 | 2,782 | 127,408 | - | 127,408 |
| Minor Arterial | - | 2,610 | 2,610 | 131,596 | 134,206 | - | 134,206 |
| Major Collector | - | 509 | 509 | 407,748 | 408,257 | - | 408,257 |
| Minor Collector | - | 3 | 3 | - | 3 | 259,728 | 259,731 |
| Local | - | 45 | 45 | - | 45 | 2,009,451 | 2,009,496 |
| Total Rural | 29,421 | 98,372 | 127,793 | 542,126 | 669,920 | 2,269,179 | 2,939,099 |
| Small Urban: | - | ||||||
| Principal Arterial: | - | ||||||
| Interstate | 2,771 | - | 2,771 | - | 2,771 | - | 2,771 |
| Other Freeways and Expressways | - | 1,389 | 1,389 | 40 | 1,428 | - | 1,428 |
| Other | - | 11,618 | 11,618 | 1,729 | 13,348 | - | 13,348 |
| Subtotal | 2,771 | 13,007 | 15,778 | 1,769 | 17,547 | - | 17,547 |
| Minor Arterial | - | 397 | 397 | 20,489 | 20,886 | - | 20,886 |
| Major Collector | - | 44 | 44 | 28,385 | 28,429 | - | 28,429 |
| Minor Collector | - | 9 | 9 | 5,517 | 5,526 | - | 5,526 |
| Local | - | 16 | 16 | - | 16 | 154,465 | 154,481 |
| Total Small Urban | 2,771 | 13,473 | 16,244 | 56,160 | 72,404 | 154,465 | 226,869 |
| Urbanized: | - | ||||||
| Principal Arterial: | - | ||||||
| Interstate | 16,612 | - | 16,612 | - | 16,612 | - | 16,612 |
| Other Freeways and Expressways | - | 10,629 | 10,629 | 152 | 10,782 | - | 10,782 |
| Other | - | 47,851 | 47,851 | 5,206 | 53,057 | - | 53,057 |
| Subtotal | 16,612 | 58,480 | 75,092 | 5,359 | 80,451 | - | 80,451 |
| Minor Arterial | - | 1,477 | 1,477 | 90,887 | 92,364 | - | 92,364 |
| Major Collector | - | 399 | 399 | 103,235 | 103,635 | - | 103,635 |
| Minor Collector | - | 35 | 35 | 16,747 | 16,782 | - | 16,782 |
| Local | - | 130 | 130 | - | 130 | 734,922 | 735,052 |
| Total Urbanized | 16,612 | 60,522 | 77,134 | 216,229 | 293,363 | 734,922 | 1,028,285 |
| Total Urban: | - | ||||||
| Principal Arterial: | - | ||||||
| Interstate | 19,383 | - | 19,383 | - | 19,383 | - | 19,383 |
| Other Freeways And Expressways | - | 12,018 | 12,018 | 192 | 12,210 | - | 12,210 |
| Other | - | 59,469 | 59,469 | 6,936 | 66,405 | - | 66,405 |
| Subtotal | 19,383 | 71,487 | 90,870 | 7,128 | 97,998 | - | 97,998 |
| Minor Arterial | - | 1,874 | 1,874 | 111,376 | 113,250 | - | 113,250 |
| Major Collector | - | 444 | 444 | 131,620 | 132,064 | - | 132,064 |
| Minor Collector | - | 44 | 44 | 22,264 | 22,309 | - | 22,309 |
| Local | - | 146 | 146 | - | 146 | 889,387 | 889,533 |
| Total Urban | 19,383 | 73,995 | 93,378 | 272,388 | 365,766 | 889,387 | 1,255,154 |
| Total Rural and Urban | 48,804 | 172,368 | 221,172 | 814,515 | 1,035,686 | 3,158,566 | 4,194,252 |
(1) Includes the 50 States, Puerto Rico, and the District of Columbia.
Please note that due to data review and production issues with the 2021 HPMS data, some anomalous and/or missing data may exist.
