Tennessee State Route 400
State Route 400 (SR 400) is a state highway in Washington and Carter counties in the U.S. state of Tennessee. It connects the cities of Johnson City, Watauga and Elizabethton.
State Route 400 | ||||
|---|---|---|---|---|
TN 400 highlighted in red | ||||
| Route information | ||||
| Maintained by TDOT | ||||
| Length | 10.9 mi (17.5 km) | |||
| Major junctions | ||||
| South end | SR 91 in Johnson City | |||
| I-26 / US 23 / US 19W in Johnson City | ||||
| North end | US 321 / SR 67 in Elizabethton | |||
| Location | ||||
| Country | United States | |||
| State | Tennessee | |||
| Counties | Washington, Carter | |||
| Highway system | ||||
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