Please keep your dog on leash and prevent him from roaming or escaping the yard. Each year, sadly many dogs are hit by a car.
According to a study that evaluated the medical records of 600 dogs who were injured in motor vehicle accidents, young males were found to be the most frequently injured. Being hit by a car caused superficial wounds, skeletal injury and soft organ injury.
Among specific injuries, the pelvis was the most frequently skeletal structure to be injured, and among the organs affected, that the liver was the most frequently.
Dogs who died as a result of being hit by a car, suffered serious intrathoracic and intraabdominal injuries, and dogs who were euthanatized had some type of central nervous system injury. https://www.ncbi.nlm.nih.gov/pubmed/1184425