State Highway 45 was originally designated in 1919 as a route from Bryan to Jasper.

This is one of the few even numbered highways in Missouri that is designated as a north-south route.

It is designated as a primary route.

FM 19 was designated in 1942 as a route between Todd City and Neches.

In practice it runs from the southwest to the northeast, though it is designated as a north-south route.

It is designated as a secondary route.

LA 23 was designated as a short route, connecting Ville Platte to points north.

SH 69 was designated in 1926 as a route from Cameron to Hearne.

The route was first designated in 1956 as a route southward from Port Arthur.

LA 60 was designated as a short route, connecting Centerville to points south.