Transport modelling for project managers - a critique of Austroads Report AP-R621-20

Aerial photograph of road


This technical note presents a critical review of the Austroads Report AP-R621-20 (Building Transport Modelling Management Capability) for project managers, modelling guide developers and modellers using analytical and simulation software for transport and traffic modelling. The review recommends that Austroads undertakes a major revision of this report to rectify the inconsistencies in the model categorisation scheme and its implications for model choice. It also suggests corrections to a large number of incomplete discussions and errors in technical details pertaining to analytical and simulation modelling for intersections and networks.

The review proposes a traffic and transport model categorisation system which uses the geographic extent of the area to be modelled as the basis of Model Types with clear relationships to the Model Level of Detail and Modelling Technique. A method is proposed for the assessment of model categories and key model features that apply to individual software packages.

The review also presents detailed discussions of specific technical aspects of the report. These include capacity estimation as a function of road geometry, traffic flows and signal timings; modelling of peak demand period; treatment of pedestrians and vehicle classes including bicycles, buses and trams / light rail; and 23 points discussing some erroneous, incomplete or misleading aspects of the report under review.

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AKÇELIK, R., BESLEY, M., ESPADA, I. and NASH, D. (2020). Transport modelling for project managers - a critique of Austroads Report AP-R621-20. Technical Note. Akcelik & Associates Pty Ltd, Melbourne, Australia.

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