Vasconcelos, Luís, Ana Bastos Silva, Álvaro Seco, and João Silva. 2012. “Estimating the Parameters of Cowan’s M3 Headway Distribution for Roundabout Capacity Analyses”. The Baltic Journal of Road and Bridge Engineering 7 (4): 261-68. https://doi.org/10.3846/bjrbe.2012.35.