nUrban expansion taking place world wide
Rich
Evolving from transportation choices - car
culture
Failure of planning system?
Poor
Rural to urban migration
Urban bias?
nPolicy challenges
Environmental impact from transportation
Preservation of open space
Pressure for housing and infrastructure provision
nPolicy response
Land use planning
Public transport subsidies & private transport taxes
Rural development
nSurprisingly few global studies of this global phenomenon
nLimited data availability