Arkansas State Route 1 is a north-south highway in Northern Phillips County. It runs from the Lee/Phillips County Line to Walnut Corner. At Walnut Corner it runs east-west to near Marvell. West of Marvell it runs north-south to the Phillips/Monroe County Line. AR St Rt 1 passes through the following towns in Phillips County. Walnut Corner Poplar Grove Marvell AR St Rt 1 is multi-plexed in Phillips County. U.S. Rt. 49, from Walnut Corner to near Marvell. Arkansas State Route 316, near Poplar Grove. AR St Rt 1 intersects the following highways in Phillips County. Arkansas State Route 242, near Lexa. U.S. Rt. 49, at Walnut Corner. Arkansas State Route 85, at Walnut Corner.
Arkansas State Route 316, near Poplar Grove. Arkansas State Route 316, at Poplar Grove. Arkansas State Route 243, at Marvall. U.S. Rt. 49, near Marvall. Arkansas State Route 39, near Turner. Arkansas State Route 316, near Turner.
