Appraisal and modelling strategy: a route map for updating TAG
Approach to understanding upcoming appraisal issues and managing their combined implications for appraisal.
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The approach we plan to take over the coming year to gain a better understanding of upcoming appraisal issues and manage their combined implications for appraisal.
Since publication of the Appraisal and Modelling Strategy, several unexpected events have occurred that have the potential to have a significant impact on scheme appraisals and are likely to come to a point over the year where we will need to take account of these in the evidence base or methods used within our Transport Analysis Guidance (TAG).
This document describes the strategic approach we are taking to change management over the course of the year. This approach aims to resolve these interlinked issues, and potentially other emerging issues in the round, to provide a consolidated update to TAG at an appropriate time, balancing the risk of disruption to ongoing analytical work with having the best available evidence to support decision-making.
TAG provides information on the role of transport modelling and appraisal, and how the transport appraisal process supports the development of investment decisions to support a business case.