Ireland’s Regional Modelling System – a Set of Tools to Make Appraisal Easier

Ireland’s Regional Modelling System – a Set of Tools to Make Appraisal Easier


Barry Colleary, National Transport Authority, Graham Bell, Jacobs, Sean Kearns, Systra


A description the Appraisal Toolkit which analyses outputs from Ireland's Regional Modelling System and provides a useful summary output to assist in the appraisal of schemes.


The National Transport Authority (NTA) has a national transport planning remit with responsibilities which include strategic transport planning and the provision of public transport infrastructure and the regulation of PT services. Jacobs and Systra were commissioned in 2012 to support the NTA in developing and enhancing its transport modelling capabilities. The aim of the commission was to create a “state of the art”, robust and transparent regional modelling system that could be implemented at an appropriate scale for each of the five city regions within the NTA’s remit.
The NTA’s new Regional Modelling System (RMS) was complete in 2016 and is comprised of five large regional models, linked by a National Demand Forecasting Model. One of the key objectives of the RMS is to support the appraisal of transport strategies for each of the five city regions. Transport strategies of this scale usually incorporate many schemes, which can lead to there being a very large number of strategy options which need to be appraised. Extracting the data necessary to undertake a meaningful comparison of different options can be a time-consuming task.
To solve this issue a set of appraisal tools have been created which automatically extract outputs from different model runs, performs comparisons of the different options and produces simple summary statistics. Together, these summaries allow the user to quickly determine which options to promote for further analysis and detailed appraisal.
This paper describes the appraisal tools and details the outputs that can be produced by each of the component modules (economy, safety, accessibility & social inclusion, health and environment). The paper will also provide examples of how these tools have already been used successfully to help deliver a number of key projects.


Association for European Transport