AR 89's southern terminus is at an intersection with U.S. Highway 70 (US 70) near the western end of Lonoke.

Within the Mayflower area, the highway gained a significant realignment to include a new overpass over the Union Pacific Railroad line, a $26.3 million project in planning since 1983.

[3] A resolution for shared financing of the overpass and realignment — which will also remove concurrency with AR 365 in the city and partially run back into unincorporated Faulkner County — was passed by the Mayflower city council in 2018, entering the city into partnership with the Arkansas Department of Transportation, Faulkner County, and the regional governmental council Metroplan.

The project was officially completed as in May 2023,[5] with the highway's prior alignment west of AR 365 ceded to the City of Mayflower.

0.29 miles (0.47 km) in length,[7] it was established in 1966[8] and deleted from the state highway system in 2014.