Both are low traffic, two-lane, highways near Greers Ferry Lake.

ArDOT estimates the traffic level for a segment of roadway for any average day of the year in these surveys.

The highway runs due north as Higden Road through a residential area before turning slightly west toward the lake.

[8] State maintenance ends along the curve, with the roadway continuing as a city street.

[11] Highway 366 was extended from Culpepper to the western terminus on May 23, 1973, following Act 9 of 1973 by the Arkansas General Assembly.