SR151 begins at an intersection with US27/SR1, south of LaFayette, in the southern part of Walker County, just north of the Chattooga County line. The road heads northeast to the unincorporated community of Naomi, where it intersects SR136. The two highways have a short concurrency. After the concurrency ends, SR151 continues to the northeast and enters Catoosa County. In Ringgold, SR151 has an interchange with Interstate 75 (I-75). Almost immediately afterward is a brief concurrency with US41/US76/SR2/SR3. SR151 departs to the north and continues until it meets its northern terminus, the Tennessee state line, where the roadway continues as Tennessee State Route 321.[1]
SR151 is not part of the National Highway System, a system of roadways important to the nation's economy, defense, and mobility.[2]
State Route151 Spur (SR151 Spur) is an 0.3-mile-long (0.48km)[3]spur route that carries US41 Truck and US76 Truck around an 11-foot-7-inch (3.53m) railroad bridge in Ringgold. The route begins along Evitt Street and travels to the north. Across from the intersection with Vermont Street, the Ringgold Fire Station can be found.[4] The fire department property ends across from the wye intersection with Kittle Street, where the road makes a reverse curve closer to the railroad tracks. The routes make a left turn at High Street and immediately have a grade crossing with the tracks. Only two other intersections exist along this segment (North Street, and Depot Street) before SR151 Spur finally ends at the SR151 mainline at the Ringgold City Hall.
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