Miss. Code § 65-3-35
The following links of highways located in the State of Mississippi are hereby designated as a scenic route:
U.S. Highway 61 at Woodville, in Wilkinson County, Mississippi, thence to Natchez, in Adams County, thence to Fayette, in Jefferson County, thence to Port Gibson, in Claiborne County, thence across the new Highway 61 Bridge, spanning Bayou Pierre, which shall be known and is hereby designated as the Irwin Russell Memorial Bridge, and which shall be so marked and designated, and from thence to Vicksburg, in Warren County, Mississippi, and running to Redwood, in Warren County, Mississippi; Mississippi Highway No. 3 beginning at point of intersection with U.S. Highway 61, north of Redwood, and running north to Yazoo City, in Yazoo County, Mississippi; U.S. Highway 49-E beginning at Yazoo City in Yazoo County, Mississippi, running north to Greenwood in Leflore County, Mississippi; Mississippi Highway No. 7 beginning at a point at or near Greenwood where same intersects U.S. Highway 49-E, running in a northeasterly direction to Grenada, in Grenada County, Mississippi; Mississippi Highway No. 7, where same intersects U.S. Highway No. 51 north of Grenada, and running north through Water Valley, in Yalobusha County, Oxford, in Lafayette County, Holly Springs, in Marshall County, and north from Holly Springs to the Tennessee-state line north of the community of Slayden, in Marshall County, Mississippi, to intersect the Austin Peay Memorial Highway in the State of Tennessee; U.S. Highway 90 from Mississippi Highway No. 607 in Hancock County, Mississippi, to the Alabama state line; the portion of Mississippi Highway No. 607 beginning at a point of intersection with Interstate Highway 10 and running southeasterly to the point of intersection with U.S. Highway 90.
All links of highway designated herein not now a part of the state system of highways in Mississippi are hereby designated and declared to be on the secondary group of highways in the State of Mississippi.
Miss. Code § 65-3-35