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Transportation Dissertation

Title Analyzing Accident Injury Severity at Intersections of Active Transport Users
Year 2022
Degree Master
School Department of Transportation and Communication Management Science, National Cheng Kung University
Author Tseng, Shih-Ya
Summary

       Active transportation is beneficial to health, transportation, and social development. Without safety environment, people will become vulnerable road users. Therefore, this study aims to investigate the factors that affect the severity of pedestrian and bicycle accidents in Taiwan.
The past research ignored the influence of heterogeneity in the data and individual differences. This study uses the traffic accident data from 2016 to 2020, used latent class method to divide the overall data into three groups, and then analyzes the overall and clustered data with a multinomial Logit model(MNL) and a random parameter(RP) model.
        Combining the results of the MNL and RP model to estimate the severity of pedestrian injuries, it is found that the variables that increase the probability of pedestrian casualties include: dusky light, female and older over 65 years old. Estimated results of bicycle injury severity estimates found that variables that increase the probability of bicycle injuries include: Light at night, flashing signs, female, drunk driving, and older over 65 years old.
       Based on the above research results, we make the following recommendations. Re-education for the older. Increased fines for drunk driving. When the light isn't bright enough, pedestrians and cyclists can wear brighter clothing or stick reflective strips on their bikes and keep bicycle lights open. Normal sign with pedestrian signal can be added at intersections with more pedestrian accidents to increase road safety for active transport user.

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