The very thorough study led by Denvil Coombe prompts us once again to consider the role of the DfT’s WebTAG transport appraisal guidance in travel demand modelling.
The production and maintenance of WebTAG are highly laudable initiatives by the Department, which should help modellers to improve their work significantly. However, it is important to understand that there are unavoidable limitations in the quality of the information on which WebTAG is based and that conclusions drawn...
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