The route is 1.00 mile (1.61 km) in length, and two-lane, undivided.

[3] The route is 1.12 miles (1.80 km) in length, connecting Highway 18 to I-555.

Dr. Martin Luther King Jr. Drive is two-lane undivided.

[1] The entire route is in Jonesboro, Craighead County.

[6] It was redesignated along another former alignment of Highway 77 on June 23, 1965,[8] now running along West Lake Street.