User: Please write a summary of the kinds of vehicles that are used for ambulances.
Assistant: The most common types of vehicle used as an ambulance are cars, vans or pickup trucks. Depending on many factors, such as accessibility to the patient and/or medical services or the urgency of treatment, other types of vehicles are used as well, including: bicycles, all-terrain vehicles, golf carts, helicopters, fixed-wing aircraft, boats, busses, trailers, horse and cart, and fire engines.