Options for the proposed Loop circulator were unveiled for public comment this summer, but planners so far have ducked the problem of what to call the thing. Following the local custom that gave Chicago the el, we get the "circ"--hardly euphonious, if gratifyingly butch.
Rail systems in San Francisco, Atlanta, and Portland bear acronymic monikers that mimic people names: BART, MARTA, and MAX. Chicago might take the concept a step farther and give its new trolley system a real name. We could honor the school superintendent by calling it the TED, because it will be expensive to install and take lots of people for a ride. Or CUB, because it will run around and around but never make any real progress.
Or we could borrow from the French and give it a name that suggests continental sophistication--the Loop de Loop.