TO THOSE who have to squeeze onto the number 25 bus in London, or the a train in New York, the change might not be noticeable. But public transport is becoming less busy in those cities,and in others besides. Passenger numbers are flat or falling in almost every American metropolis, and in some Canadian and European ones, too. That is despite healthy growth in urban populations and employment. Nose-to-armpit travellers may be even more surprised to hear that the emptying of public transport is a problem.
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