Center City can have one or more options for public transportation. A commuter is someone who travels regularly from his/her residence to the place of work or study. This would usually need a mode of transport. Public transport can be a viable option. These are transport run for a large number of people, on specified on unspecified routes, made available for the general public. Some of the options that may be available include buses, trolleybuses, trams and trains, rapid transit (metro/subways/undergrounds etc) and ferries, among others. If one travels regularly, one can even book season tickets on some of these. One may also need to travel larger distances, like from one city to another, or between states. For these, one can use trains, airlines and coaches. Center City can have various options available, and one can check them out. Taking public transport is usually a smarter thing to do. Not only is it cheaper than using a car, it can also be more convenient, as one need not worry about parking or parking charges (or violations!). It is also more environment friendly, as the per person fuel consumption drops drastically. These transportation options have regulations for their smooth running, and local authorities who govern them.