Please note that the content of this book primarily consists of articles available from Wikipedia or other free sources online. Numerous bannered routes of U.S. Route 67, all business routes, exist. One other route, formerly an alternate route in western Illinois, has since been downgraded to state Route 267.All of the business routes within Texas are maintained by the Texas Department of Transportation (TxDOT). U.S. Route 67 has seven current and two former business routes within the state, with two of these located in San Angelo. Along US 67, TxDOT identifies each business route as Business U.S. Highway 67 followed by an alphabetic suffix. Along Texas U.S. routes, the alphabetic suffixes on business route names ascend generally eastward and southward. As US 67 is labeled as a west-to-east route, its initial business loop in Presidio is suffixed with an A. There are gaps in the alphabetic values to allow for future system expansion or for decommissioned routes. The alphabetic naming suffixes are included as small letters on the bottom of route shields.