I recently visited Bangalore, India’s high technology centre. It has grown to become the third most populous city in the country, and the traffic congestion is impressive. A new elevated road is under construction from the airport to the city centre. Initially, I had the impression that a system of elevated roads was being constructed throughout the city, but it turned out that what I saw is a new metro, underground in the centre, elevated above the larger roads beyond. 7km of the metro is already open, with 42 planned in total.
Rail is the right response to population growth in a dynamic city in which roads will never be able to cope with the potential demand for car use.