On average, collisions that occur during the night are more frequent and traffic fatalities at night are three to four times higher in the day. There are three primary reasons for the increased danger associated with night driving. Vision is limited at night and drivers may be temporarily blinded by the lights of other cars; furthermore, there is a greater probability of encountering fatigued drivers as well as those under the influence of drugs and alcohol. This has caused many states to have higher fines at night for certain moving violations.