All appraisal and modelling values referred to in the Transport Analysis Guidance (TAG).
The Transport Analysis Guidance (TAG) data book includes all of the appraisal and modelling values referred to in the guidance in 1 workbook.
Forthcoming changes list all current approved changes to the data book.
The data book was updated in December 2015. Changes made to the data book are detailed in the data book’s audit sheet.
The previous version of this data book was TAG data book, November 2014.
WebTAG provides information on the role of transport modelling and appraisal, and how the transport appraisal process supports the development of investment decisions and business cases.