A major reason why transit is not the preferred choice of more people is that taking transit is very slow in comparison with driving. While many cities have chosen to speed up transit by building expensive rapid transit lines, the truth is that any one rapid transit line can only serve a small part of a metropolitan area. Even in New York you cannot take subways everywhere. Because of this fact, the humble local bus will continue to serve the majority of transit patrons for years to come. One way in which cities have chosen to speed up local bus service is through the installation of bus bulbs. Learn more about bus bulbs .