nUrban expansion taking place world wide
Rich
Evolving from transportation choices - car
culture
Failure of planning system?
Poor
Rural to urban migration
Urban bias?
nSeen as posing a variety of policy challenges
Environmental impact from transportation
Loss of farmland?
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