Abstract
This paper reports and reviews the findings of a wider research project recently completed at Imperial College, London. The research investigated the actual impacts of building new roads in urban areas in order to throw more light on whether it is worthwhile building such roads. A number of examples of road building in different urban areas in Britain, Germany and Sweden were examined to see whether these schemes met their stated objectives, with particular attention to re‐distributing traffic and relieving traffic congestion. Additional case studies of major improvements to public transport systems in different cities were also undertaken to examine the extent of relief they offered to the roads in their corridors. Finally the lessons to be learnt are discussed and comparisons are made between the priorities and approaches in the different countries studied.

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