Ethics and the Evaluation of Transport Policies and Projects
- Transport Economics, Management and Policy series
Chapter 5: Long-term Sustainability and Transport Evaluation
5. Long-term sustainability and transport evaluation 5.1 INTRODUCTION Questions related to long-term sustainability and transport evaluation include: ● ● ● ● ● Is discounting OK in the case of CO2 or effects on the natural environment? How to compare future generations with the current generation? How important is the current infrastructure for future generations? How to deal with the possible depletion of fossil fuels in the ex ante evaluation of transport policy options? Will the free market result in an optimum allocation of CO2 emissions in the case of a cap-and-trade system? How useful is the resulting market price for the ex ante evaluation of transport policy options? Societies benefit heavily from transport. The transport system allows people to carry out activities at spatially separated locations, and allows goods to be transported. The flipside of the coin is that transport causes negative impacts on society, with safety, environmental impacts and congestion being the most dominant effects. Negative impacts on the environment include CO2 emissions that are a likely cause of climate change, and emissions of Particulate Matter (PM) – CO, VOC and NOx – resulting in local air pollution. Road vehicles, trains and aircraft produce noise resulting in noise nuisance. Apart from emissions related impacts, infrastructure can often be a barrier for man and animals (see below). In addition, the presence of driving and parked vehicles negatively influences liveability, even when they are not using energy or emitting pollutants and noise – for example, where children cannot play on the street or travel to school independently. Furthermore, at...
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