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* Certified Data provided for On-System Daily Vehicle Miles, Centerline Miles and Lane Miles are based on calendar year 2022, provided by TPP-Data Management. These mileage statistics are On-System only (under the jurisdiction of TxDOT).
| County | Value * |
|---|---|
| Brazoria | 5,773,676.982 |
| Fort Bend | 8,736,284.207 |
| Galveston | 5,384,092.424 |
| Harris | 65,392,793.565 |
| Montgomery | 12,031,378.867 |
| Waller | 2,276,021.301 |