DAYLIGHT SAVING TIME AND MOTOR-VEHICLE CRASHES - THE REDUCTION IN PEDESTRIAN AND VEHICLE OCCUPANT FATALITIES

Fatal crashes were tabulated for 6-hour periods around sunrise and sun set, from 13 weeks before the fall change to standard time until 9 wee ks after the spring change to daylight saving time. Fatal-crash occurr ence was related to changes in daylight, whether these changes occurre d abruptly with the fall and spring time changes or gradually with the changing seasons of the year. During daylight saving time, which shif ts an hour of daylight to the busier evening traffic hours, there were fewer fatal crashes. An estimated 901 fewer fatal crashes (727 involv ing pedestrians, 174 involving vehicle occupants) might have occurred if daylight saving time had been retained year-round from 1987 through 1991.