A Diploma Thesis titled ‘Severity of single vehicle accidents’   was presented by Georgios Pispirigkos in July 2011. Lognormal regression models were developed, which allowed the identification of the effect of various parameters (accident type, weather conditions, lighting conditions, etc.) on the number of killed, seriously and slightly injured for each vehicle type separately. Accidents in which two or more vehicles are involved were found more severe and severity was found higher at accidents involving pedestrians and passenger cars.