Tennessee State Route 21
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| Route information | ||||
| Maintained by TDOT | ||||
| Length: | 39.88 mi (64.18 km) | |||
| Major junctions | ||||
| West end: | Mississippi River near Tiptonville | |||
 SR 22 at Tiptonville SR 78 at Tiptonville US 51 at Troy US 45W in Union City
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| East end: |
  KY 116 / KY 239 north of Union City at the Kentucky state line |
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| Location | ||||
| Counties: | Obion, Lake | |||
| Highway system | ||||
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State Route 21 is a two lane highway that runs from the Mississippi River west of Tiptonville, Tennessee to the Kentucky state line north of Union City. This road provides access to Reelfoot Lake State Park.
SR 21 begins in rural Obion County at the state line at the intersection of KY 116 and KY 239. It then travels south to an intersection with US 51 and SR 3 just north of Union City. It then enters Union City on N Clover St., then turns west on E Cheatam St., then south again on N Division St. to intersect SR 5 and SR 22 in Downtown. It then travels concurrently with SR 5 to intersect US 45W/SR 184/SR 431 in southern Union City. It then travels south along US 45W/SR 5, Intersecting SR 216 along the way. It then separates from US 45W/SR 5 near Rives, and turns west. In Troy, It intersects with US 51/SR 3 again, running concurrently for a short ways before separating and turning west again into downtown Troy. Once in town, it then intersects with SR 184 (old US 51) in the heart of Troy. It then leaves Troy, still going west, and enters Hornbeak and has an intersection with SR 183. It continues west to just south of Samburg, to intersect and run concurrently with SR 22. It then runs along the shores of Reelfoot Lake, then turns west again to enter Tiptonville and intersect SR 78. SR 22 then separates and turns north, while SR 21 continues west to the banks of the Mississippi River, where SR 21 ends and the road continues as Tiptonville ferry rd. along the Tennessee-Obion Levee.
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