Spur 422 is a former route of
SH 16, and was designated (along with
Spur 421) on November 16, 1965, after SH 16 was rerouted around the west side of San Antonio along the
Loop 410 freeway. Originally, the highway had a direct interchange with I-35 at its northern end. There are still many stubs, bridges, and grading for the ramps. ==Major intersections==