The Latin root it means “go.” Here we “go” on an “it” itinerary!Mass transit systems enable travelers to “go” across urban areas in an efficient fashion. These mass transit systems were initiated or “gone” into in the first place to clear city roads of cars. The mass transit systems make a circuit of the city, or “go” round them so as to serve all parts. This allows an itinerant person, or person on the “go,” to “go” to any part of a city that she wishes to as quickly as possible.