It has the benefit of being suitable for disabled riders.
It also offers paratransit services for disabled riders and an on-demand shared ride service.
But that has not deterred disabled riders willing to pay $3,000 or more - a cost not usually covered by medical insurance.
"I especially want to expand our program for disabled riders."
It charges disabled riders the basic mass transit fare of $1.50.
The majority of disabled riders are children, but some young patients are terrified and want nothing to do with the horses.
Michael A. Harris, 20, a college student who uses a wheelchair, said many disabled riders must take medications several times a day.
But for disabled handicapped riders, the expense buys their independence.
Discounted fares for disabled riders and veterans would also apply.
The demonstrators contended that the buses were inaccessible to disabled riders.