成篇嘢就淨係計number of injury同severe and fatal injury by bus 同by car
呢個咪好明顯淨係睇likelihood,因為無論injury定severe and fatal injury 大家都係同等severity比較
如果呢個係risk assessment
咁By car個likelihood咪可以係low-med
咁by bus個likelihood 咪可以係low
咁梗係reduce risk of injury㗎
但個severity大家咪又係永遠一樣,如果撞死人大家都係撞死人都係high severity喎