The highway exits Texas into Louisiana near Joaquin, crossing the Toledo Bend Reservoir.

The highway just passes north of the Texas Tech University campus and enters downtown as Avenue Q.

Leaving the city, US 84 serves the towns of Post and Snyder before reaching Roscoe, where it begins its overlap with I-20.

In Gatesville, the hwy meets SH 36, which coincidentally also runs to Abilene, albeit in a more direct way than US 84.

The highway crosses the Brazos River and enters Bellmead before leaving the Waco area to the northeast/east.

US 84 runs through several smaller communities in East Texas before meeting US 59 (future I-69) in Timpson and follows that highway to Tenaha.