Sustainable Transportation Planning

公路运输经济已被确定为温室气体（GHG）排放增加的主要原因。一方面，这是由于道路上的车辆流量不断增加。另一方面，绝大多数车辆仍然由传统的化石燃料驱动。在过去的几年里，各国政府签署了许多国际协议，承诺减少温室气体排放的趋势。因此，在地方和国家两级采取了若干战略，包括改进公共交通的性能，促进替代流动和货运分配模式，以及采用非矿物燃料车辆。

The road-transportation economy has been identified as a major cause of the rise of Green-House Gas (GHG) emissions. On the one hand, this is due to the fact that vehicle traffic on roads is constantly increasing. On the other, the large majority of vehicles are still powered by traditional fossil fuels. In the last years, many international agreements have been signed, committing governments to decrease GHG emission trends. As a result, several strategies have been adopted at local and national levels, including improvements in the performance of public transit, the promotion of alternative mobility and freight distribution paradigms, and the adoption of non-fossil fueled vehicles.