Abstract
In order to strengthen the safety of highway roadsides, it is necessary to take targeted measures according to the roadside hazards, so there is an urgent need to develop research on risk evaluation of highway roadside accidents. Based on accident simulation analysis and the form of accident after vehicles run to the roadside, the rollover risk of roadside accident is classed into four grades, namely, no departure from the ground, slight departure from the ground, one or two turnovers, and more than two turnovers. The factors involved in the causes of roadside accidents of different rollover risks are studied, and the thresholds of driving speed, sideslope gradient, and sideslope height are given. A Bayesian network for risk evaluation of roadside accidents is constructed. Based on the factor thresholds for the causes of roadside accidents, the calculation methods of the probability of different rollover risks of roadside accidents are carried out according to a single factor, two factors, and three factors. The typical cases of roadside accidents are analyzed and the calculation results of the Bayesian network show that the probability of one or two turnover accidents is 0.939, which is consistent with the results of roadside accident simulation tests, proving the accuracy of the risk evaluation methods for highway roadside accidents.
Highlights
By the end of 2016, China’s total highway mileage reached 4,696,300 km, and roadside accidents accounted for about half of accidents, in which more than three people died
The results indicated that only cross-sections influenced driver behaviors, and the drivers did not change their behaviors on highways without barriers
In the case of known states of any two indicators among the slope gradient B1, the slope height B2, and the driving speed B3, they are respectively recorded as Bi0j0, Bi00j00 (i0, i00 2 1, 2, 3; i0 61⁄4 i00; j0, j00 2 1, 2, 3, 4), and formula (4) can be used to calculate the probability of roadside accidents of different rollover risks
Summary
By the end of 2016, China’s total highway mileage reached 4,696,300 km, and roadside accidents accounted for about half of accidents, in which more than three people died. The analysis of the simulation test results shows that as the slope gradient gradually steepens, the number of turnovers experienced by the vehicle gradually increases, meaning an increase in rollover risk. The analysis of the simulation test results shows that the probability of vehicle turnover accidents increases with increasing height of the slope. At a fixed driving speed, the roadside accident rollover of risk increases with increases of the slope gradient and height. According to formula (1) and Table 6, the probability of the slope gradient falling into each of the above four levels can be calculated in the case of Level I roadside accidents
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Free) 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
