Tennessee State Route 431
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| Route information | ||||
| Maintained by TDOT | ||||
| Length: | 16.58 mi[1] (26.68 km) | |||
| Major junctions | ||||
| South end: |
   US 45E / SR 22 / SR 216 at Martin | |||
   US 45W / SR 5 / SR 184 at Union City | ||||
| North end: |
  US 51 / SR 3 at Union City | |||
| Location | ||||
| Counties: | Weakley, Obion | |||
| Highway system | ||||
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State Route 431 is a secondary state highway in Tennessee. SR 431 runs southeast to northwest from just southeast of Martin in Weakley County to just east of Union City in Obion County.
State Route 431 is the original alignment of State Route 22, a primary state highway. It was replaced with the current four-lane divided, access-controlled section which now parallels the former route to the north. The old portion was then designated State Route 431.
SR 431 is known in Martin west of the downtown area as University Avenue. The campus of the University of Tennessee at Martin is located along University Avenue, which divides it into the main campus area and the agriculture campus, where the football stadium, ROTC, and the rodeo pavilion are located. The Martin Wal-Mart and the communities of Gardner and Midway are also located along this highway, as is an access road to Everett-Stewart Regional Airport.
Major intersections
| County | Location | mi | km | Destinations | Notes |
|---|---|---|---|---|---|
| Weakley | Martin | 0 | 0 | US 45E / SR 22 / SR 216 west – Milan, Union City, South Fulton | Southern terminus of SR 431 |
  US 45E Bus. north (Lindell Street) | southern/northern end of US 45E Business wrong-way concurrency | ||||
| US 45E Bus. south (Elm Street) | northern/southern end of US 45E wrong-way concurrency | ||||
 SR 43 (Skyhawk Parkway) – South Fulton | |||||
| 5.2 | 8.4 | SR 22 north – Union City | Interchange; No access to SR 22 south | ||
| Obion | 13 | 21 | SR 22 – Union City, Martin | Interchange | |
| Union City | US 45W north (Miles Avenue) – South Fulton | Southern/northern end of US 45W wrong-way concurrency | |||
| US 45W south (First Street) – Trenton | Northern/southern end of US 45W wrong-way concurrency | ||||
| US 51 (Reelfoot Avenue/Jere B. Ford Memorial Highway) to SR 22 – South Fulton, Dyersburg | Northern terminus | ||||
1.000 mi = 1.609 km; 1.000 km = 0.621 mi
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