Mark Besley will present our analyses of HCM roundabout capacity research data at the TRB 6th International Conference on Roundabouts (15-18 May 2022). These are now available in our Publications section. AKÇELIK, R., SHIRKE, C., BESLEY, M., ESPADA, I. and BILLINGHURST, D. (2022). A Comparative Analysis of Exponential and Linear Roundabout Capacity Models Using HCM Research Data. Technical Note. Akcelik & Associates Pty Ltd, Melbourne, Australia. Abstract This report presents an investigation to assess basic exponential (non-linear) and linear model forms used in practice for roundabout...