Transport management is one way on which urban areas can attempt to be more sustainable. It usually involves either changing the type of transport, for example cycling and waking instead of using vehicles. It could include using alternative fuels or promoting and organising modes of transport to encourage the population to use a particular type which would make the urban area more sustainable. Sustainable is defined as ensuring we meet our present needs without compromising the needs of future generations. Toronto is a developed urban area, so in theory should have a more sustainable transport system than a newly developed city such as Curitiba or Rio de Janiro, who may have other problems, such as poverty which they may be trying to solve and so not focusing on having a sustainable transport system. It is very difficult to make cities completely sustainable due to the high density population with a high demand for energy and high quality of life; the dense population also means that a lot of people would have to be taught how to live sustainably and be encouraged to live sustainable, so it is not feasible that a large urban area would ever be able to be completely sustainable. Sustainability can be represented by the sustainability stool; it shows that for an area to be sustainable it must be take into accounts social, economic and environmental aspects of sustainability. This is a good way to check whether an area is covering all three areas of sustainability and not just one or two.
Toronto has introduced many initiatives to try and increase levels of sustainability, especially with reference to transport. Toronto is the largest city in Canada and the provincial capital of Ontario, located on the north-western shore of Lake Ontario. In the 1970s the decision was made not to expand