This video comes from the new BBC series What If? : a series which looks into the future in key areas of science, politics, education and our personal life.
In this video BBC News looks at the ways in which new technology can help to keep us all mobile.
There are more than a billion cars in the world today – and by the middle of the century there could be up to four times as many, as the growing middle classes of countries like India, China and Brazil seek the freedom and status car ownership appears to offer.
But if so many people want to drive – how will we prevent global gridlock?
gridlock= saturation, bouchons (sur la route), impasse (dans des discussions)