We live in a world that is urbanising at an astonishing rate: 100 years ago only 20% of people lived in a city, by 2010 more than half the worlds population was living in an urban area and by 2050 we expect that figure to rise to 70%.  As these mega-cities become increasingly dense and over-populated, the transport systems that support them are struggling to cope with the sheer numbers of people trying to move around.  Many cities around the world are starting to wake up to the fact that they will have to become walkable and bikeable, just in order to function in the future.

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