Analysis based on these factors
"We analysed each country on five factors, giving each one a normalised score out of ten for each factor, before taking an average final score across all five factors," Zutobi said. These factors included estimates on the number of road traffic deaths per 100,000 population; the percentage of car occupants who use a seat-belt when travelling in the front of a vehicle; and the proportion of road traffic deaths which have been attributed to alcohol consumption over the national legal limit.