Towne Car is part of the Greater San Antonio Transportation Company, which also operates a Yellow Checker Cab service. Rather than yellow cabs, the Towne Car service maintains a fleet of more than 25 Lincoln Towne Cars for transporting more discriminating passengers. The Towne Cars are available through advanced reservations. Yellow Checker s fleet of taxis includes six-passenger vehicles, wheelchair accessible vehicles and mobile billboard space for sale. The company s drivers work on an independent contractor basis, and they accept all major credit cards.