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The objective of sustainable transport is to ensure that our transport systems meet society's economic, social and environmental needs whilst minimising their undesirable impacts on the economy, society and the environment. Transport has played an important role throughout human evolution. In modern society, it is a driver of economic growth and allows people to commute and to travel. Ultimately, transport is a major resource and an important instrument for ongoing European integration. Growth in transport activities puts increasing pressure on natural resources and on societies. Emissions of greenhouse gases, air pollutants and noise from transport affect the climate, environment and human health. In addition, increasing energy consumption by the transport sector requires more resources. Moreover, transport infrastructure fragments landscapes and ecosystems on a large scale. Increased transport activities and accidents with fatal outcomes create social costs and time losses due to congestions.