Reaching the end of the River Sub at River Junction/Madlock, BNSF 1055 proceeds onto the Thayer South Sub as BNSF 9685 (C NAMPAM0 30) and BNSF 524 (U SLOMEM1 02) wait to the north.

BNSF 1055 waits for a northbound to pass on the River Sub at Turrell, Arkansas, before continuing to Memphis and eventually Birmingham, Alabama.