A tranche of updates to the Department for Transport’s Transport Appraisal Guidance has been released including detail of the new concept of ‘spending objective analysis’. The revised TAG data book provides all of the appraisal and modelling values referred to in TAG guidance. The data book features historical information and factual reference information about the appraisal and modelling values.
The previous version, TAG Data Book v1.21, was released in May 2023. The TAG...
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