The doctrine of sudden emergency does not apply where a driver creates the dangerous situation himself by recklessly attempting to flee a police road block. The defence requires that the danger be created by another's wrongful act, not by the accused's own conduct. Where a driver is aware of a police road block, has initially complied with police signals, and then suddenly speeds off recklessly, striking and killing an officer who was stationary and attending to duties, this constitutes culpable homicide as the driver acted without due regard to the safety of others. The driver's conduct in such circumstances is negligent and falls below the standard expected of a reasonable driver.