Whether transport interchanges can become or can help to create destinations depends at least in part upon the ability of the surrounding area to generate a variety of economic activities and a critical mass of people. Where this commercial potential exists it can, in turn, help attract funding to improve interchange and permeability functions. The major cities forming the hubs of the high speed rail network have all benefited from this synergy, but perhaps the biggest challenge is to find a way of extending the virtuous circle to small interchanges in more peripheral areas.
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