Modal Alternatives for Transit- Oriented Communities

Discussions of urban form invariably lead to discussions of urban transportation. This is understandable, as transportation has proven to be among the most influential factors affecting the density and shape of metropolitan areas. This topic is of particular interest to those involved in the design of new communities or in the redevelopment of older ones. These individuals may not have a background in urban transportation nor be aware of the variety and suitability of the many options for mobility. For this reason, this paper compiles, in concise form, descriptions of the transportation modes and families in use today, particularly those classified as public transportation. Moreover, an emphasis is placed on the fit between forms of public transportation and forms of urban development. For simplicity, three types of development are cited herein: (1) the neighborhood, an urbanized area containing a concentration of residences and supporting activities; (2) the district, an urbanized area specialized around one predominant activity; and (3) the corridor, an area between the boundaries of neighborhoods and districts (Fig. 1).