Of fundamental importance for cities is the existing urban form. Creating and supporting the movement of people, goods, information and services is vital to the functionality of a city. By evaluating technological advances in transportation and their impact on spatial form in the United States, an interconnection between the two is created that has organized to create spatial patterns that exist today. In the context of the United States, there are four distinctive transportation eras and growth patterns. This research will analyze and focus on the recreational automobile eras (1920-1945) and the highway era (1945-present). With the aim of making clear the distinctive spatial structure that has dominated each era. Showing how reorganization processes occurred after the implementation of advances in transportation and the manipulation of urban form that occurred as a result. This will then be used to determine how the next era of transportation will change the existing landscapes we know today. Keywords: transportation, urban form, spatial structure, transportation technologies Transportation Systems: Reshaping Urban Form Historical and Future Evolution The American landscape today displays the mass consumption of space and resources of the past. These actions together describe the society and cities that exist today as a result of rapid growth and industrialization. Although progress has been made, the common perception of disorder, corruption and inequality remains intact in the urban form. Starting in the early 1900s, thanks to the integration of the railroad and streetcar into the urban landscape, middle-income families were able to move from the city to the suburbs (a migration pattern that continues over a century later). Just before the middle of the sheet of paper surrounding them. By the 1920s Henry Ford's development of the assembly line had reduced the cost of ownership by making it accessible to the masses. While the automobile had a strong presence in the urban core in the 1920s and 1930s, infrastructure improvements were concentrated in rural areas. Road paving and road construction would provide farmers with greater connectivity to reach services. Where the automobile for urban residents was used for recreational activities on weekends. By 1922, 135,000 suburban homes in 60 cities were already entirely dependent on the automobile as a means of transportation (Irrante). This increase in car ownership has resulted in a shift in mode choice, resulting in a loss of passengers. As well as the residential development that occurs further away from the rail arteries; resulting in loss of revenue for tram companies.