Traffic congestion and parking difficulties. Congestion is one of the most prevalent transport problems in large urban agglomerations.
Public transport inadequacy. Many public transit systems, or parts of them, are either over or under used. During peak hours, crowdedness creates discomfort for users as the system copes with a temporary surge in demand.
Difficulties for pedestrians. These difficulties are either the outcome of intense traffic, where the mobility of pedestrians and vehicles is impaired, but also because of a blatant lack of consideration for pedestrians in the physical design of facilities.
Loss of public space. The majority of roads are publicly owned and free of access.
Environmental impacts and energy consumption. Pollution, including noise, generated by circulation has become a serious impediment to the quality of life and even the health of urban populations.
Accidents and safety. Growing traffic in urban areas is linked with a growing number of accidents and fatalities, especially in developing countries.
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