[For the English abstract and full text of the article please see the attached PDF-File (English version follows Russian version)].ABSTRACT The author proceeds from the fact that human-saving efforts, technically sound and environmentally efficient measures to reduce accident rate on roads (and especially on country roads) can bring the expected results only if there is a well-established system of accident prediction. These prediction methods should take into account the impact of a complex of factors, including the time of the day, traffic intensity, features of road environment and other significant aspects of the transport process. In the present study the focus is put on dependence of traffic accidents on the period of the day, the nature of day, night and twilight hours of a calendar cycle. Keywords: roads, time of traffic, accident rate, consequences of road accidents, human factor, forecasting, prevention.