I-55 splits from I-40 in West Memphis.Diagram of Lake David Interchange
I-55 enters Arkansas from Memphis, Tennessee, on the Memphis & Arkansas Bridge over the Mississippi River, sharing the bridge with US61/US64/US70/US78/US79. Shortly after entering the state, the highway enters West Memphis, where US70 exits the route and becomes Broadway Avenue. I-55/US61/US64/US78/US79 form a concurrency with I-40 at exit5, an overlap that lasts 3.1 miles (5.0km).[2] The highways split at I-40 exit277, with I-40/US79 continuing west to Little Rock and I-55/US61/US64/US78 running north into Marion. US64 exits I-55/US61/US78 in Marion, continuing west as Old Military Road toward Wynne. I-55 continues to run through farmlands of the Arkansas Delta, paralleling Highway77 (AR77) until Turrell.
Turrell to Missouri state line
In Turrell, I-55/US61/US78 meets the southern terminus of I-555, a spur route of I-55 connecting Jonesboro to the Interstate Highway System. I-555 run north to Jonesboro, while AR77 and US61 become frontage roads for I-55/US78. Slightly east of this junction, these frontage roads depart I-55/US 78, with AR77 running near Birdsong and US61 serving Wilson. I-55/US 78 runs northeast to enter Mississippi County, having junctions with AR 118 to Joiner, AR 181 to Bassett, AR 14 near Marie, and AR181 near Keiser. In Osceola, the route has a junction with AR 140 near Osceola Municipal Airport.[3] I-55/US 78 continues northeast, intersecting minor state highways in rural Mississippi County before a junction with US61 in south Blytheville. US78 departs from I-55 where it intersects AR 18 in Blytheville before exiting town headed due north. The route has a junction with AR 150 just before crossing the Missouri state line.
Northern end of US 61 concurrency; signed as exits 23B (AR 77 south) and 23A (I-555/AR 77 north) southbound; US 61 not signed southbound; southern terminus and exits 1B-A on I-555
12Planning and Research Division (March 28, 2012). "Arkansas Road Log Database". Arkansas State Highway and Transportation Department. Archived from the original(MBD) on June 23, 2011. Retrieved April 13, 2012.
↑General Highway Map, Crittenden County, Arkansas(PDF) (Map). 1:62500. Cartography by Planning and Research Division. Arkansas State Highway and Transportation Department. January 2, 2007. Archived from the original(PDF) on February 26, 2012. Retrieved April 26, 2012.
↑General Highway Map, Mississippi County, Arkansas(PDF) (Map). 1:62500. Cartography by Planning and Research Division. Arkansas State Highway and Transportation Department. January 11, 2010. Archived from the original(PDF) on January 15, 2021. Retrieved April 26, 2012.
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