Define urban form and explain how it is shaped by transportation networks.

• A. The legal framework for zoning determines urban form regardless of transport
• B. The physical structure of a city (street pattern, land use) is shaped by social interactions only
• C. The physical structure of a city (street pattern, land use) is shaped by how people and goods move; rail, roads, and bus lines influence where growth occurs and how dense
• D. Urban form is solely determined by climate and topography

Answer: (C)

Urban form is the physical layout of a city—the street network, block sizes, land-use patterns, and how dense different areas are. Transportation networks shape this form because they determine how easily people and goods can move to and from places. When rail, roads, and bus lines create reliable, fast access to certain areas, development concentrates there, land values rise, and places become more densely built. This leads to growth corridors and nodes around transit stations, a pattern often described as transit-oriented development. Conversely, networks that prioritize car movement and long highway commutes tend to encourage suburban sprawl and lower densities farther from cores.

So the way people and goods move—driven by the layout and capacity of the transportation system—directly influences where growth happens and how dense it becomes. Zoning, social interactions, climate, and topography all matter, but the transport network is a primary force that shapes the actual physical form through accessibility and land-use decisions.