For instance, a deer may suddenly leap out on the road in front of you. There may be an accident ahead that has not yet been reported and your path may be blocked. Bad weather may have torn up or washed out the road or bridge ahead. Besides these situations, there are also times when you may be distracted or suffer some sort of attack while behind the wheel. In these cases, your chances of surviving would be much better if you were driving at a lower, safer speed.
Emergencies Emergencies are always worse after dark than during daylight hours.
There is less traffic and fewer chances for assistance. You have fewer choices of action and you are far more vulnerable to danger. Pull your vehicle off the main highway as far as possible. If there is a shoulder, use it. Turn on emergency flashers if you have them.