You will have time to plan your escape if the hazard becomes an emergency.
The National Safety Council defines defensive driving as "driving to save lives, time, and money, in spite of the conditions around you and the actions of others." Defensive driving is about anticipating potentially dangerous situations in advance, including driving conditions and mistakes made by others, and planning how to deal with those situations. To be a defensive driver, you must constantly scan for hazards all around your vehicle. When you spot a hazard, think about the emergencies that might develop from it and formulate plans to deal with them.