All of the business loops are maintained by the Texas Department of Transportation (TxDOT).

Interstate 45 (I-45) has four business loops in the state, all located in northern Texas.

Along Texas Interstates, the alphabetic suffixes on business route names ascend eastward and northward.

The alphabetic naming suffixes are included as small letters on the bottom of route shields.

I-45-F) is a business loop of I-45 that passes through Corsicana in Navarro County.

The highway travels along Dallas Street and has a major intersection with FM 813.