Southern Arkansas segment thumb|The first reassurance marker on AR 549 north of US 71 near Texarkana. A temporary designation of AR 549 had been assigned to I-49 between US 71 north of Texarkana and Doddridge, from the state line.
SoUTHern arKansas sEgmeNt Thumb|ThE FiRST rEassUrancE marker on aR 549 nORTh of uS 71 neaR tExarkANA. a teMpOraRy designation of ar 549 Had BEen assignEd to i-49 beTWEeN us 71 NortH oF teXarKAna and DOddridge, from thE sTAte lIne.