Why must you prepare and make emergency plan when realize a hazard?

National Safety Council defines defensive driving as "driving to save lives, time, and money, regardless of the conditions around you or the conduct of others." When you drive defensively, you prepare for potential dangers, such as road conditions and other people' errors, and you come up with a plan for how to handle them. To be a defensive driver, you must continually look out for potential hazards all around your vehicle. When a risk is present, plan for any emergencies that might develop from it and how you will handle them.