The route is maintained by the Arkansas Department of Transportation (ArDOT).

The route runs west in a concurrency with AR 18 over Interstate 555 (I-555) and US 63 as Dan Avenue.

The concurrency continues west as Kings Highway until AR 18 turns south near Dryden.

The route continues north to cross I-57/US 67 before terminating at US 412B in Walnut Ridge.

[2] [3] Media related to Arkansas Highway 91 at Wikimedia Commons