Located in Medina and Bexar counties, the 15.983-mile-long (25.722 km) highway serves as an arterial street through the growing western suburbs of San Antonio.

[2] In far western Bexar County, Potranco Road travels through recently built, patchy, residential developments.

[2] The highway continues eastward, serving residential developments, commercial outlets, and John Paul Stevens High School.

State maintenance ends at an intersection with Culebra Road (formerly FM 3487), slightly west of Interstate 410 (I-410).

On December 30, 1988, the entire routing along Culebra Road was transferred to the newly created FM 3487.

[7]) The Texas Department of Transportation (TxDOT) started defining urban roads on June 27, 1995, at which time the segment of FM 1957 east of Loop 1604, measuring 5.4 miles (8.7 km), was transferred to the newly defined Urban Road 1957 (UR 1957).