This has been the subject of extensive research over many years and it is not possible to discuss it in detail in this blog, other than in general terms.
The main reason our transport system is so costly is that it promotes the least efficient modes of travel and transport ie motor vehicles for personal travel and most of the freight task (some of which could be transported more efficiently on rail). This in turn demands more infrastructure to support them and has been supported by city planning and development policies, particularly since WW2.
This problem is compounded when precious funds are wasted on infrastructure we don’t need or would not need if we operated our transport system more efficiently but must still be managed and maintained at considerable cost. Some of this infrastructure takes up valuable city space that could be used for other purposes, such as housing or community facilities including parks or growing food. Transport infrastructure – particularly roads and motorways also contribute to the “heat island” effect by elevating surface temperatures which increase stress, service disruptions and reduce liveability in cities – particularly during heat waves, the frequency and intensity of which is expected to increase in the future.
Melbourne’s transport is also costly because of the way we use it. Our transport fleet needs to be more efficient with a greater focus on fuel economy and operated in a way that minimizes pollution – air, noise and groundwater. We need to minimize impacts on human health; not just from pollution but also from accidents and fatalities. Transport related health impacts manifest themselves in a wide range of diseases: cardiovascular, neurological, respiratory, muscularskeletal diseases, and severe mental health impacts. Many of these the result of physical inactivity more likely to occur in car dependent societies such as Melbourne. There are environmental impacts as well and an imperative to reduce greenhouse emissions.
These costs are under reported and tend to be dismissed as the price we pay for progress but they have a profound impact – not just at a personal level but for the economy and livability of the city as a whole. Reducing them requires good governance in the form of sound policy, strategic intervention, appropriate regulation, and effective administration to make it happen. Some cities do a far better job managing them than Melbourne so there is considerable scope for improvement.
There are also costs which some economists and politicians exaggerate such as congestion and use it to justify major infrastructure works, particularly for building new motorways. This will be the subject of my next blog.