Systems of transportation long ago developed out of the profound human need to connect and communicate. Transport today is still the only means for the physical movement of goods and people. Alongside the evolution of transportation and communication technologies, the astounding phenomenon of urbanization has taken place. Cities have grown faster and larger, absorbing vast influxes of dwellers who seek convenient and comfortable lifestyles with the required fast, cheap, and safe systems of transport. Of the world's megacities, with populations of more than ten million, over half are in...