As the world’s urban populationgets bigger, cities are strugglingto provide the basic servicesthat their residents need. Oneof the most pressing problems is publictransport. Take a look at the crisis facing thecity of London. At no time in history has As the world’s urban populationgets bigger, cities are strugglingto provide the basic servicesthat their residents need. Oneof the most pressing problems is publictransport. Take a look at the crisis facing thecity of London. At no time in history has