Lake Road | ||||
SR 78; primary in red, secondary in blue | ||||
Route information | ||||
Maintained by TDOT | ||||
Length | 36.93 mi (59.43 km) | |||
Existed | October 1, 1923[1]–present | |||
Major junctions | ||||
South end | ![]() | |||
![]() ![]() ![]() | ||||
North end | ![]() | |||
Location | ||||
Country | United States | |||
State | Tennessee | |||
Counties | Dyer, Obion, Lake | |||
Highway system | ||||
|
State Route 78 (abbreviated SR 78) is a 36.93-mile (59.43 km) long primary state highway in northwestern Tennessee, USA. This highway carries a dual primary and secondary designation, however, the majority of this highway is signed as a Primary State Highway. The only portion of SR 78 designated as secondary is between its southern terminus at SR 104 to US 51 in Dyersburg.