ABSTRACT
Considering that a growing share of the global population lives in cities, urban transportation issues are of foremost importance to support the mobility of passengers in large urban agglomerations. Urban transportation is associated with a spatial form which varies according to the modes being used. Grid street patterns have endured through history. Urbanization occurs in accordance with the development of urban transport systems, particularly in terms of their capacity and efficiency. Urban transportation aims at supporting transport demands generated by the diversity of urban activities in a diversity of urban contexts. The invention of the electric traction motor created a revolution in urban travel. Transit is almost exclusively an urban transportation mode, particularly in large urban agglomerations. Most urban transit developments had little, if any, impacts to alleviate congestion, in spite of mounting costs and heavy subsidies. Public transit systems are therefore challenged to remain relevant to urban mobility or to increase its market share..
