Road Collisions Data by fatal, serious or slight severity casualty groups by borough and ward. An collision is classed by the worst level of casualty. For example if an accident caused 1 slight injury, 2 serious injuries, and 1 fatality, the collision would be classed as fatal. Road casualty statistics can be found at a separate page. Accident and casualty data can also be found on DFT's Road Safety Data page. See more on the UKDA w...