In the European Union, the transport sector is responsible for 31% of the energy consumption and for 21% of the GHG community emissions excluding aviation.
The evolution of the industrialised countries’ cities which currently gather the essential of human activities, has reinforced the concentration of the population in urban centres (Currently, 80% of the European population is concentrated in urban areas).
This fact reinforced the increase of the transport pollution up to 40% of greenhouse gases in the cities. Despite the public transport offer, the use of individual vehicles such as cars remains frequent. By habit, comfort, independence, freedom, users abandon their personal vehicle with difficulty. In the city, we frequently observe thus problems of roadway saturation and increase of pollution of the air, etc.