Appraisal and modelling tools
Tools are available to assist with appraisal and modelling of transport.
Software and data
The Department for Transport produce and support software for assessing whether road schemes provide value for money, publications providing guidance on how to predict the traffic impacts of road schemes, and traffic growth forecasts.
- COBA (COst Benefit Analysis) and QUADRO4 (QUeues And Delays at ROadworks)
- DIADEM (Dynamic Integrated Assignment and DEmand Modelling)
- INCA (INcident Cost-benefit Assessment)
- TEMpro (Trip End Model program)
- TUBA (Transport Users Benefit Appraisal)
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.
- Research and development of guidance
- a collection of advice and guidance on modelling and appraisal of transport projects – WebTAG
The National Transport Model
The National Transport Model (NTM) provides a systematic means of comparing the national consequences of alternative national transport policies or widely-applied local transport policies, against a range of background scenarios which take into account the major factors affecting future patterns of travel.
