High Quality Content by WIKIPEDIA articles! Interstate 40 (I-40) is an east–west Interstate Highway that has a 284.69-mile (458.16 km) section in the U.S. state of Arkansas connecting sections in Oklahoma to Tennessee. The route enters Arkansas from the west just north of the Arkansas River near Dora. It travels eastward across the northern portion of the state connecting the cities of Fort Smith, Clarksville, Russellville, Morrilton, Conway, Little Rock, Forrest City, and West Memphis. I-40 continues into Tennessee heading through Memphis. The highway has major junctions with Interstate 540 at Alma, the main highway connecting to Fayetteville and Bentonville, Interstate 30 in Little Rock, the Interstate linking south to Texarkana and Dallas, Texas, and Interstate 55 to Blytheville.