Urban Transport Development Paths

Source: adapted from Barter, P.A. (2004) A Broad Perspective on Policy Integration for Low Emissions Urban Transport in Developing Asian Cities. Draft paper for the International workshop Policy Integration towards Sustainable Energy Use for Asian Cities: Integrating Local Air Pollution and Greenhouse Gas Emissions Concerns. Institute for Global Environmental Strategies,

Service Attributes of Urban Transport Modes

Source: adapted from R. Tolley and B. Turton (1995), p. 63. Different urban transport modes have different operational speeds and capacities. The car is obviously the least efficient urban transport mode in terms of capacity (between 1,000 and 3,000 persons per hour), but the fastest, most convenient, and flexible. Urban

Density and Car Use in Selected Global Cities, 2000s

Source: Millennium Cities Database for Sustainable Transport. The strong association between density (number of people per hectare) and car use (share of car use for commuting) indicates that modal preference, urban form, and density are closely related. For Houston and Los Angeles, dispersed developments and low densities leave limited choices

Evolution of the Spatial Structure of a City

The urban spatial structure considers the location of different activities in central areas and the periphery. A central area is a cluster of core and/or central activities, and the most central area of a city is usually labeled as the central business district (CBD). Core activities are those of the

Evolution of Urban Densities in North America and Europe

The conceptual relationship between distance and urban density varies between European and North American cities. While density in North American cities has generally decreased through sub-urbanization and the creation of peripheral centers, in Europe, there was an extension away from the urban center. Furthermore, density in central areas of North

Population Density by Distance from City Center, Selected Cities

Source: adapted from A. Bertaud (2003) “Metropolitan Structures Around the World”. Notable differences in population density gradients from the city center can be observed among a sample of world cities. For Asian and European cities, there is a steep gradient related to compact and relatively well-defined urban areas, while in

Population Density of the World’s Largest Metropolitan Areas, 2012

Source: Demographia World Urban Areas: 9th Annual Edition (2013.03). Urban density is reflective of the mode of habitation elected by the population, with high-density cities characterized by apartment buildings (or crowded slums), while lower-density cities have low-rise habitation units and even single-family homes in the suburbs. It is also reflective