<P> The most unexpected facilities, though, may be the dentist's office and the chiropractic clinic . The dentist usually arrives at around 9am; some of his patrons are local residents rather than truckers . In the Modern Marvels episode "Truck Stops" on the History Channel, the dentist states that he is sometimes the "truckers best friend" because he is providing treatment that is usually aimed at "taking them (the drivers) out of pain". According to the dentist interviewed for the episode, the dentist office in Iowa 80 is very beneficial because it provides a service to patients that might not otherwise get to visit a dentist due to the nomadic lifestyle that over-the - road truck drivers lead . The dentist's office in Iowa 80 accepts both private pay and most all of the major dental insurance plans offered to drivers by companies, making its services accessible to a much wider range of clients . </P> <P> Across the hall from the dentist is a recently added chiropractic clinic . Services include chiropractic adjustments and Department of Transportation physicals . </P> <Ul> <Li> <P> A wide shot of the exterior captures the scope of the building's size . </P> </Li> <Li> <P> The exit - ramp sign boasts this is the "World's Largest Truckstop". </P> </Li> </Ul> <Li> <P> A wide shot of the exterior captures the scope of the building's size . </P> </Li>

I 80 largest truck stop in the world