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* Certified Data provided for On-System Daily Vehicle Miles, Centerline Miles and Lane Miles are based on calendar year 2023, provided by TPP-Data Management. These mileage statistics are On-System only (under the jurisdiction of TxDOT).
| County | Value * |
|---|---|
| Armstrong | 378.654 |
| Carson | 779.518 |
| Dallam | 698.260 |
| Deaf Smith | 603.286 |
| Gray | 762.061 |
| Hansford | 525.404 |
| Hartley | 550.755 |
| Hemphill | 384.149 |
| Hutchinson | 492.907 |
| Lipscomb | 414.262 |
| Moore | 486.792 |
| Ochiltree | 431.619 |
| Oldham | 471.729 |
| Potter | 915.366 |
| Randall | 933.279 |
| Roberts | 243.505 |
| Sherman | 444.773 |