Updates to a number of Transport Appraisal Guidance documents including a data update regarding economic and demographic data, non-exhaust emission factors, greenhouse gas valuations, and the introduction of guidance on large cost changes in appraisal are to be published next month, the DfT has announced .They will affect the TAG data book and unit A1.3 (user and provider impacts).
There will also be a forthcoming change comprising a major revision of TAG unit M5.3 on supplementary economic...
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