Wheelchair Lift Ramp Not Sure If This Can Be Answered. How To Get Wheelchair Bound Patients On To A Bus With No Lift?

Not sure if this can be answered. How to get wheelchair bound patients on to a bus with no lift? - wheelchair lift ramp

A bus all its forms throughout the city, but no elevator. How to bring the patient in a wheelchair to see the exhibition? It is a very old bus. Car ramps can be used through the rear emergency exit? Please, no jokes. It is for patients in nursing homes.