Here is a great series of photos we uncovered on Flickr thanks to Kevin Mueller. He has some terrific photos, so check them out.

36-passenger crosstown "trackless trolley" bus. Baltimore, MD.
36-passenger crosstown “trackless trolley” bus. Baltimore, MD.
Baltimore trackless trolley
Baltimore trackless trolley
Baltimore trackless trolley
Baltimore trackless trolley
Baltimore Transit trackless trolley #2016
Baltimore Transit trackless trolley #2016