Austroads has recently completed a project to review and propose improvements to the guidance on interrupted traffic flow theory contained within the Austroads Guide to Traffic Management (AGTM), Part 2 and Part 3. The updates will broaden practitioners’ understanding of interrupted traffic flow theory and enable them to manage congestion on road networks more effectively. This webinar, presented by Mark Plattz and Emily Plath, will equip practitioners with the knowledge of the existing topics and emerging best practice in the assessment of simple and complex traffic scenarios in an Australasian context. Presenters outline the work undertaken during the project and detail the proposed changes to Part 2 and Part 3 of the Guide to Traffic Management. The key areas that have been identified for development in AGTM Part 2 and Part 3 include bottlenecks, travel time reliability, roundabout theory, analysis of signalised intersections, active transportation and demand management, multi-modal considerations and traffic flow impacts of heavy vehicles.