Roundabout Model Comparison Table

Abstract

This short document presents a table comparing main features of three roundabout capacity models, namely the Australian model as implemented in the SIDRA INTERSECTION software, the HCM Edition 6 model described in Chapter 22 of the Highway Capacity Manual Edition 6, and the UK TRL model implemented in the RODEL and ARCADY software. The HCM Edition 6 model and the earlier HCM 2010 model are available as model options in the SIDRA INTERSECTION software. The term SIDRA Standard is used to distinguish between the Australian model and these two models in SIDRA INTERSECTION. The HCM Edition 6 model assessments included in the comparison table given in this document apply to the HCM 2010 model as well. The features compared include methodology, model level of detail (lane-based or approach-based), parameters used in the model to represent driver behaviour and roundabout geometry, and model calibration methods.