5. Reasons for notable increase in fatal accidents from evening to late night during rainfall
  The following section divides each day into two time periods - (1) 5:00 p.m. to 2:00 a.m., when there are the highest number of fatal accidents during rainfall and (2) 3:00 a.m. to 4:00 p.m., when the number of fatal accidents is roughly the same as during periods of no rainfall - and compares the factors involved in these fatal accidents.
(1) Characteristics according to circumstances
  Figure 6 shows the number of fatalities per hour according to vehicle type, during rainfall and no rainfall, for the two periods 5:00 p.m. - 2:00 a.m. and 3:00 a.m. to 4:00 p.m. Each time period has its own characteristics regarding accidents involving vehicles and pedestrians.
Fig. 6  Numbers of fatalities per hour by time period and vehicle type


Chart 5. Comparison of fatalities per hour during rainfall and no rainfall by time period and vehicle type


  Figure 7 reveals that on a per hour basis during rainfall there are more fatalities involving passenger vehicles, motorcycles with engines of over 50cc, and pedestrians during the time period from 5:00 p.m. - 2:00 a.m. than the time period from 3:00 a.m. - 4:00 p.m.
Fig. 7  Numbers of fatalities per hour by time period and vehicle type during rainfall


Chart 6  Comparison of fatalities per hour during rainfall by time period and vehicle type


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Institute for Traffic Accident Research and Data Analysis (ITARDA)