[2] From the south, Highway 129 begins as a continuation of LA 33 at the state line.

[2] A 2010 study of annual average daily traffic (AADT) by the Arkansas State Highway and Transportation Department (AHTD) reveals that about 500 vehicles use the daily basis around Lawson, and around 1,000 vehicles per day use the road near the northern terminus.

[3] The route was later extended to Strong around 1930 as State Road 2 was rerouted through Crossett.

[4] The short segment to Lawson was added between 1965 and 1966 and remains along the original alignment today.

The route of 2.24 miles (3.60 km) serves to connect Huttig to the state highway system.