Mountainous freeways always suffer from accidents due to special terrain, weather conditions, driving environment, and so on. Based on the records of 898 accidents that occurred on mountainous freeways in Chongqing during the past 6 years, the partial proportional odds model is used to identify the factors affecting the accident severity. The time of the accident, season, involvement of trucks, accident characteristics, speeding, maximum driving experience of involved drivers, and weather and road conditions are found to be important for the levels of accident severity. Zero to 6 a.m. and 19 to 24 p.m. are the times prone to serious traffic accidents. The probability of serious traffic accidents in summer and autumn is greater than that in spring and winter. Once a truck is involved in an accident, the consequence is often more severe. Turnover and speeding will result in a grave accident. When there is an experienced driver, the probability of serious traffic accidents is low. The fog is extremely unfavorable weather conditions. The probability of serious accident happening in the downgrade, ramp, curve, bridge, and tunnel sections is greater than the others. The results aim to provide valuable reference for traffic safety on mountainous freeways.
Due to the complex topography and geological conditions of the mountainous two-lane highway, the road alignment is complex, the excavation is more, the road space is complex and changeable, and traffic safety accidents are frequent. In order to explore the influencing factors that affect the driver's visual load, this paper systematically sorts out the research on the driver's visual load in the field of road traffic safety, and summarizes the concept, influencing factors and evaluation methods of visual load. In future research, it is necessary to consider the influencing factors and changing laws from more angles, and conduct a comprehensive study.
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