| State Highway 31 | ||||
|---|---|---|---|---|
| Route information | ||||
| Maintained by TxDOT | ||||
| Length: | 143.3 mi (230.6 km) | |||
| Existed: | before 1939 – present | |||
| Major junctions | ||||
| West end: |
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| East end: |
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| Location | ||||
| Counties: | McLennan, Hill, Navarro, Henderson, Smith, Gregg | |||
| Highway system | ||||
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