Research and development of guidance

The Department has a programme of research work on modelling, appraisal and evaluation. The aim of this work is to support the continuing development of the New Approach To Appraisal by improving our advice on transport modelling and economic appraisal.

Cost Damping in Travel Demand Models

The research investigated realism tests of transport models and the role of cost damping mechanisms. There was very strong evidence to support the use of cost damping, but little evidence to favour one particular mechanism. Theoretical considerations favour mechanisms that permit the value of time to increase with trip length. A ‘kilometrage test’ rules out some damping mechanisms and/or places bounds on their parameters, which need to be estimated as an integral part of model development.

23 February 2010

GB Freight Model - Upgrade report and user guide report

The GB Freight Model (GBFM) is a freight transport demand model developed by MDS-Transmodal and used by the DfT within the National Transport Model (NTM) framework.

Long Distance Modelling

Find out more on Long Distance Modelling.

Valuing transport's impact on the natural landscape

The landscape impacts of transport schemes are assessed under the Department's New Approach to Appraisal (NATA) using a qualitative system known as the Environmental Capital Approach. This research project aims to estimate transferable monetary values for the impacts individual transport schemes have on the natural landscape in England using economic valuation techniques. The Phase 1 report and its annexes present the findings of the first of three phases of work.

The demand for cars and their attributes

Two studies looking at how the demand for new cars changes in response to the fixed and variable costs of motoring.

The impact of transport on business locations

The aim of this research was to gain a quantified understanding of business location, particularly the role of transport within this, and implement that understanding within a model that can be used for forecasting the number of jobs in each area of the country. A substantial part of the project was devoted to assembling time series data for the two case study areas, Milton Keynes and South and West Yorkshire.

Thames Gateway

The Government's policy in the Thames Gateway is to seek to create the conditions to achieve high levels of sustainable development of housing and employment within a framework of regenerated communities and broad-based urban renaissance.

Travel time variability

DfT define travel time variability as unpredictable variation in journey times. Hence travel time variability is confined to random effects. It excludes predictable variation relating to varying levels of demand by time of day, day of week, and seasonal effects.

Variable demand modelling consultation advice background papers

Research has been undertaken to examine how the Guidance on Induced Traffic in DMRB 12.2.2 could be clarified and expanded.

Wider impacts in transport appraisal

Wider impacts (formerly referred to as wider economic benefits) of transport derive from the indirect impacts transport can have on transport using markets which are not perfectly competitive. The possibility of including these impacts in appraisal was first considering in SACTRA (1999) and subsequently the Eddington Study (2006). This part of the website contains several discussion papers and research papers written either by the department or by academics and experts in this area of appraisal.

LASER 3.1 Update

LASER3.1 Update Report is about a study that the Department commissioned to Mott MacDonald (Motts) in 2005, to update the London and the South East Region (LASER 3.0) land use/ transport interaction model base year to Census 2001 and to carry out a number of model tests. The purpose of this project was to produce a present day model validation. Any model re-calibration was outside the scope of this work. The new model is referred to as LASER 3.1.

TEMPRO Planning Data Guidance Note

This report describes the processes and methodology involved in producing the TEMPRO policy-based planning data forecasts for version 5.

22 January 2007
Last update:
04 July 2008

Integrated Transport Economics and Appraisal: overview of available publications

25 January 2006

An Introduction to Transport Analysis

A summary of the government's appraisal methodology, the four parts to appraisal and the the government's transport objectives.

25 January 2006

Archived content

The following content is available from the Department for Transport web archive .

Departure time choice

Integrated transport economics and appraisal

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