chapter  5
20 Pages

Transit-Oriented Development and the Urban Fabric

WithRobert Cervero

Over the next several decades, around 90 per cent of the world’s urban population growth will be in the Global South (UN Habitat 2011). If developing countries continue on their trajectories of the past decade – i.e., annual population growth rates of 2.5 per cent and a decline in built-up densities of 1.5 per cent a year – the world’s cumulative area of built-up, impervious surfaces will double in 17 years and triple in 27 years (Angel 2011). The long-term ecological consequences of converting land from natural habitats and open space to urban functions – diminished water supplies, the release of more pollutants into the air, heat-island effects, and lost agricultural land – could be devastating.