主播大秀

How much do traffic jams cost an economy? From the road-enraged of Calcutta to the rain-soaked of Tunisia, we discover the true cost of congestion. Over recent years the global trend towards urbanisation has rapidly increased, but the capacity of the world's mega-cities to keep so many billions of people on the move hasn't. Where are the world's worst traffic jams? Cities from Bangkok to Mumbai to Lagos will all stake a claim. We hear from Garrett Emmerson, CEO of Transport for London, Tim Lomax, a senior research engineer at the Texas A&M Transportation Institute plus we sit in a traffic jam in Calcutta.