The costly gridlock: how can we keep our cities moving?

As the UK’s population continues to grow, transport systems in our urban centres will increasingly feel the strain. So what can be done?Cities around the world confront a huge and pressing problem: how do you accommodate growing numbers of people? It is forecast that by 2050, two-thirds of the world’s population will live in urban areas, and transport planners face the daunting task of making sure everyone can move around without too much of a struggle.The UK’s population is ex