The NZ Transport Agency has published research report 588 ‘Why are some urban traffic signals much less safe than others?’. This research prepared by Paul Durdin, Carl O’ Neil and Dave Smith of Abley involved detailed analysis and site inspection of urban signalised intersections across New Zealand. Traffic volume and intersection form were found to be the main predictors of crash performance as found in previous research. In addition, the information collected through the site visits and subsequent analysis informed the development of design guidance which will help practitioners ensure the best possible safety outcomes for road users. Read the article on this research in our most recent newsletter (issue 119).