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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 | 409,205.902 |
| Carson | 879,255.658 |
| Dallam | 450,495.573 |
| Deaf Smith | 483,900.675 |
| Gray | 675,311.588 |
| Hansford | 144,818.129 |
| Hartley | 496,284.706 |
| Hemphill | 126,621.529 |
| Hutchinson | 331,975.698 |
| Lipscomb | 89,721.746 |
| Moore | 570,403.860 |
| Ochiltree | 244,591.181 |
| Oldham | 828,328.872 |
| Potter | 2,882,962.369 |
| Randall | 1,835,733.923 |
| Roberts | 78,515.534 |
| Sherman | 260,273.517 |