The outputs from a Transport Model can provide essential insight into the understanding of an existing or future transport problem, thereby supporting infrastructure design and operational planning. A transport model can also identify the likely impacts that will result from a proposed project, strategy or Transport/Environmental Policy. As such, the Transport Model plays an essential role as a decision-support tool, providing relevant and accurate information into planning and decision making.

This document has been prepared by JASPERS to provide guidance on the development of Transport Models for use in the development and appraisal of transport projects where a suitable national guidance document does not exist. The guidance is presented in two parts and is intended for use as a starting point aide by:

• Part A: Guidance for the Managing Authority to assist in the understanding and definition of modelling requirements during the procurement process, and subsequently to review work that has been undertaken during project preparation;
• Part B: Guidance for the Expert to demonstrate how a transport modelling exercise will align with the views of JASPERS experts for the nature of project under consideration. It is also a reference for those in the Managing Authority who are seeking a greater understanding of the processes involved in Transport Modelling.

This document sets out key requirements that should be considered during the scoping, development and application of transport models for use both in the preparation of transport projects, and in the development of local, regional and national Transport Strategies.

It is intended that this guidance will support an improved quality of modelling tools, which will improve their capability to provide the relevant information to design teams and policy makers in the conception, assessment and appraisal of transport projects and policies. The document is not intended to be a substitute for experience in defining modelling requirements. In this regard, Managing Authorities should always ensure that their beneficiaries and consultants have sufficient experience to procure and develop models that are fit for purpose.

Download the full guidance here.