The Transport Appraisal and Strategic Modelling (TASM) division produces guidance for the Department for Transport (DfT) on:
- project modelling and appraisal
- value for money assessments
- analytical assurance
It is also responsible for providing evidence on trends in, and drivers of, strategic transport outcomes, including multi-modal forecasting and simulation of policy impacts.
Transport appraisal guidance
TASM maintains and develops DfT’s guidance on modelling and appraisal for transport projects (WebTAG) and provides advice and assurance to internal and external stakeholders.
Value for money guidance
We develop and update value for money guidance and scrutinise value for money advice submitted to ministers and DfT’s investment boards.
We oversee DfT’s analytical assurance framework which provides internal guidance on how analysis should be specified and undertaken in DfT. We also scrutinise the quality of analysis included in submissions to ministers.
Road traffic forecasts
We maintain and develop the National Transport Model (NTM) to produce national road traffic forecasts and estimates of the impacts of national policies on levels of traffic, congestion and transport emissions. We undertake broader analysis of the underlying drivers of road travel and understand trends.
We provides analysis on strategic issues affecting business cases across the department.
Joint Analysis Development Panel support
We provide secretariat support to the Joint Analysis Development Panel, which offers expert advice to DfT on its modelling and appraisal methods and strategies.
Documentation about our activities includes:
- The National Transport Model (NTM)
- TEMPro (Trip End Model Presentation Program)
- WebTAG: TAG data book
- how we assess business case for major investments
- understanding and valuing impacts of transport investments
- WebTAG: a full collection of advice and guidance on modelling and appraisal of transport projects
- value for money advice for proposed transport interventions
- appraisal and modelling tools
- appraisal and modelling research reports
- Road traffic forecasts 2015
- Understanding the drivers of road travel
- Car traffic levels in Britain: evidence review
- Road traffic demand elasticities
Joint Analysis Development Panel
The Joint Analysis Development Panel (JADP) was established in 2015 to provide expert advice to the Department for Transport (DfT) on its modelling and appraisal methods and strategies.
JAPD terms of reference
JAPD annual reports
- Joint Analysis Development Panel: annual report 2015 to 2016
- Joint Analysis Development Panel: annual report 2016 to 2017
- Joint Analysis Development Panel: annual report 2017 to 2018
JADP brings together academic and professional experts with senior departmental analysts. It is co-chaired by DfT’s Chief Analyst and Science Director, Amanda Rowlatt, and Professor Peter Jones, Director of the Centre for Transport Studies, University College London.
The other academic members are:
- Richard Batley, professor of transport demand and valuation, Institute for Transport Studies (ITS), University of Leeds
- Phil Goodwin, emeritus professor of transport policy, University College London and University of the West of England
- Glenn Lyons, Mott MacDonald Professor of Future Mobility, University of the West of England and Mott MacDonald
- Anthony Venables, professor of economics, Oxford University
- Tom van Vuren, visiting professor ITS Leeds and Mott Macdonald
- Tom Worsley, ITS Leeds
The panel is supported by a broader network of subject matter experts who are invited to attend meetings on specific issues.