Tennessee State Route 181

State Route 181 (abbreviated SR 181) is a primary state highway running through Lake, Dyer, and Lauderdale counties in Tennessee. This highway traverses very sparsely populated areas and is located entirely within the flood plains of the Mississippi River, Obion River and Forked Deer River. SR 181 is constructed as a modern two-lane facility with paved shoulders and a 55 mph (89 km/h) speed limit throughout its length. Prior to its designation as a state highway (and subsequent raising of the levee), it was a narrow gravel road. It is constructed atop the "Big Levee" in Dyer County and is used as a primary defense against floodwaters from the Mississippi River itself, however, floodwaters from the Obion River often back up on the eastern side of the levee. This highway doesn't pass through any municipalities or unincorporated communities. The area is a popular destination for fishermen and hunters.

State Route 181
Great River Road
Route information
Maintained by TDOT
Length	25.10 mi (40.39 km)
Major junctions
South end	SR 88 at Hales Point
	I-155 / US 412 Exit 2 near Ayers
North end	SR 79 near Cottonwood Grove
Location
Counties	Lauderdale, Dyer, Lake
Highway system
Tennessee State Routes Interstate U.S. State ← SR 180 → SR 182