According to the World Health Organization (WHO) traffic accident survey, 50%–60% of traffic accidents are related to drunk driving, which has been listed as the leading cause of death by WHO.The results of the analysis on data from the period of 2012–2016 showed that the number of collisions decreased yearly. However, the rate of drink-driving collisions increased yearly, which might be because the people who drink do not know the harm of drunk driving, drunk driving, which leads to more traffic crashes of drunk driving.Relevant laws all over the world have stipulated the provisions of restricting drinking and driving in different forms and heavier penalties are imposed on drunk drivers[26–27]. China has now imposed criminal penalties on drunk drivers.
Chinese people have some festivals every year, and the Spring Festival is the most important festival. Every year, the end of January or February is the Spring Festival in China. Everyone has a week’s holiday during the Spring Festival. Everyone will have a family gathering at this time. The Spring Festival of 2012–2016 begins at the end of January or February, and the week of vacation is in February. The gathering increased the number of people drinking, so the detection rate of drunk driving increased. In this study, the highest detection rate of drunk driving was found in February. June is the beginning of summer vacation, and there is no long festival in this month. So the number of people who drink has decreased, and the detection rate of drunk driving in June is the lowest. The incidence of road traffic injury in thailand increases is also on the rise during long holiday seasonsl，which is the same as our findings.
In our research, there was statistical difference in detection rate of drunk driving between the two groups, and the detection rate of drunk driving at nighttime was 1.86 times as high as that in the daytime. The results of dividing the data into 2-hour periods showed that the number of collisions was the greatest in the period from 22:00–00:00, and the detection rate of drunk driving was greatest in two periods: 00:00–02:00 and 02:00–04:000. In the current analysis, there were two break points between 04:00–06:00 and 06:00–08:00, and between18:00–20:00 and 20:00–22:00. It is believe this is because drinkers would choose to drive home if the party ended early (around 3:00 am), resulting an increase in drunk driving incidents, but they would not choose to drive home if the party ended late. Regarding the abrupt change between 18:00–20:00 and 20:00–22:00, it is believed that after 20:00, parties would end gradually and people would drive when they left the dinner, causing such a break point. Regarding the small peak at the period from 14:00–16:00, it is believed that drinkers would drive home after dinners or work events, resulting in drink driving incidents.Traffic policemen should pay attention to the strict inspection of drunk driving peak time and holidays every night in their work. Police should be deployed at key sections and intersections, and inspection stations should be set up.Reduce the occurrence of drunk driving accidents.
The number of non-local vehicles being drive in Guangzhou reached 4,550,000 per month at the end of 2013, and included 300,000 non-local vehicles that have always been used in Guangzhou, with the other being urban transit and peripheral vehicles. Most transit vehicles were freight vehicles, and they had no defined work days and non-work days, which likely affected the difference of drunk-driving rate between work days and non-work days. More than half of the collisions occurred on urban roads and on weekdays during the daytime. A total of 3,333 collisions occurred during 1,252 work days, with a detection rate of drunk driving collisions of 59.8%. A total of 1,653 collisions occurred during 575 non-work days, with a detection rate of drunk driving collisions of 60.9%. Lili Ji et al.indicated that the detection rate of drunk driving of non-local vehicles was 3.197 times as high as that of local vehicles . There were statistical differences in the number of drink driving collisions on work days between 2012 and 2016, and between 2015 and 2016, indicating that drunk driving collisions on work days in 2016 were significantly lower compared to 2012 and 2015.
Regarding accident damage, we found that there were 1.51 times as many drunk driving collisions as non-drunk driving collisions. There were significant differences in the mortality rate and injury rate between drunk driving and non-drunk driving collisions, but the mortality and injury rates in the non-drink driving group were higher than those in the drunk driving group, which was consistent with results reported by Le Li et al ， that is, the casualty rate of collisions caused by drivers with a low blood alcohol concentration (0 mg/100 mL < BAC < 20 mg/100 mL) were higher than that of drunk driving collisions. It is believed that many people have confidence regarding their mental state, control ability, and reactivity, but in fact these have all been affected by the alcohol. Although they could well avoid non-moving objects (such as protective fences and border trees), they would not be able to avoid moving objects such as pedestrians and vehicles suddenly appearing, resulting in road traffic collisions with injuries or deaths. When the blood alcohol concentration of the drivers was high (BAC ≥ 20 mg/100mL), which significantly reduces reactivity, they could not well avoid non-moving objects (such as protective fences and border trees), and thus it was less likely that a person would be injured, resulting in lower casualty detection rate of drunk driving collisions than that of non-drunk driving collisions.