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Frontiers of Structural and Civil Engineering

ISSN 2095-2430

ISSN 2095-2449(Online)

CN 10-1023/X

Postal Subscription Code 80-968

2018 Impact Factor: 1.272

Front. Struct. Civ. Eng.    2022, Vol. 16 Issue (5) : 657-666    https://doi.org/10.1007/s11709-022-0827-z
RESEARCH ARTICLE
Presentation of machine learning methods to determine the most important factors affecting road traffic accidents on rural roads
Hamid MIRZAHOSSEIN1(), Milad SASHURPOUR2, Seyed Mohsen HOSSEINIAN1, Vahid Najafi Moghaddam GILANI2
1. Civil–Transportation Planning Department, Faculty of Technical and Engineering, Imam Khomeini International University (IKIU), Qazvin 34148-96818, Iran
2. School of Civil Engineering, Iran University of Science and Technology (IUST), Tehran 13114-16846, Iran
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Abstract

The purpose of this research was to develop statistical and intelligent models for predicting the severity of road traffic accidents (RTAs) on rural roads. Multiple Logistic Regression (MLR) was used to predict the likelihood of RTAs. For more accurate prediction, Multi-Layer Perceptron (MLP) and Radius Basis Function (RBF) neural networks were applied. Results indicated that in MLR, the model obtained from the backward method with the correct percent of 84.7% and R2 value of 0.893 was the best method for predicting the likelihood of RTAs. Also, MLR showed that the variables of not paying attention to the front not paying attention to the frontroad ahead, followed byand then vehicle-motorcycle/bike accidents were the greatest problems. Among the models, MLP had a better performance, so that the prediction accuracy of MLR, MLP, and RBF were 84.7%, 96.7%, and 92.1%, respectively. MLP model, due to higher accuracy, showed that the variable of reason of accident had the highest effect on the prediction of accidents, and considering MLR results, the variables of not paying attention to the front and then vehicle-motorcycle/bike accidents had the most influence on the occurrence of accidents. Therefore, motorcyclists and cyclists are more prone to accidents, and appropriate solutions should be adopted to enhance their safety.

Keywords safety      rural accidents      multiple logistic regression      artificial neural networks     
Corresponding Author(s): Hamid MIRZAHOSSEIN   
About author:

Tongcan Cui and Yizhe Hou contributed equally to this work.

Just Accepted Date: 23 June 2022   Online First Date: 01 August 2022    Issue Date: 30 August 2022
 Cite this article:   
Hamid MIRZAHOSSEIN,Milad SASHURPOUR,Seyed Mohsen HOSSEINIAN, et al. Presentation of machine learning methods to determine the most important factors affecting road traffic accidents on rural roads[J]. Front. Struct. Civ. Eng., 2022, 16(5): 657-666.
 URL:  
https://academic.hep.com.cn/fsce/EN/10.1007/s11709-022-0827-z
https://academic.hep.com.cn/fsce/EN/Y2022/V16/I5/657
description values percentage
accident severity damage 15.76%
injury/fatal 84.24%
accident time 00:00 to 06:00 4.92%
06:00 to 12:00 21.87%
12:00 to 18:00 43.7%
18:00 to 24:00 29.52%
accident day start of the week 25.78%
middle of the week 40.55%
weekends 33.67%
accident season spring 28.71%
summer 30.17%
autumn 20.41%
winter 20.71%
road surface condition dry 87.32%
wet 12.45%
snowy 0.23%
daylight condition day 71.02%
night 27.82%
sunset/sunrise 1.15%
type of vehicle accident vehicle-vehicle 24.21%
vehicle-heavy truck 0.54%
vehicle-agricultural machinery 0.77%
vehicle-motorcycle/bike 42.85%
vehicle-animal 0.5%
vehicle-object 6.57%
getting out off the road 24.56%
driver age less than or equal 18 2.92%
18 to 30 36.4%
30 to 45 38.28%
45 to 60 16.48%
60 and over 5.92%
driver gender male 95.39%
female 4.61%
weather condition clear/sunny 79.01%
cloudy 13.53%
rainy 6.96%
snowy 0.5%
reason of accident not paying attention to the front 14.45%
violation to left and right 34.74%
violation of the speed limit 0.73%
technical and safety tips defect 1.69%
turning in a forbidden place 6.26%
backward movement 2.23%
failure to observe longitudinal and transverse spacing 2.31%
right-of-way violation 17.06%
inability to control 20.22%
animal-caused accident 0.31%
Tab.1  Specifications of variables in this research
method goodness of fit (R2) correct percent
forward stepwise 0.734 81.5
backward stepwise 0.893 84.7
Tab.2  Summary of the Multiple Logistic Regression methods
parameter chi-square df significance level
step 15 step –2.505 1 0.113
block 539.423 21 0.000
model 539.423 21 0.000
Tab.3  Backward stepwise model result
observed predicted
accident severity correct percent
damage injury/fatal
accident severity
 damage 57 353 13.9
 injury/fatal 44 2148 98.0
overall percent 84.7
Tab.4  Classification in MLR model
variable β standard error wald statistic significance level exp (β)
00:00 to 06:00 –0.707 0.256 7.627 0.006 0.493
spring 0.499 0.143 12.177 0.001 1.647
summer 0.436 0.084 26.941 0.000 1.547
night 0.282 0.077 13.413 0.000 1.326
vehicle-heavy truck –0.602 0.298 4.081 0.044 0.548
vehicle-motorcycle/bike 0.766 0.068 126.894 0.000 2.151
vehicle-object –0.129 0.032 16.251 0.000 0.879
male 0.528 0.258 4.188 0.041 1.696
cloudy 0.273 0.121 5.090 0.024 1.314
not paying attention to the front 0.894 0.340 6.914 0.008 2.445
violation to left and right 0.728 0.166 19.233 0.000 2.071
violation of the speed limit 0.564 0.244 5.343 0.021 1.758
technical and safety tips defect 0.264 0.127 4.321 0.037 1.302
turning in a forbidden place 0.375 0.094 15.915 0.000 1.455
failure to observe longitudinal and transverse spacing 0.244 0.085 8.240 0.004 1.276
right of way violation 0.182 0.045 16.358 0.000 1.200
inability to control 0.180 0.037 23.667 0.000 1.197
constant –0.590 0.515 1.312 0.043 0.554
Tab.5  Multiple logistic analysis result in the fifteenth step
samples observed predicted
damage injury/fatal correct percent
training damage 238 47 83.5%
injury/fatal 29 1502 98.1%
overall percent 74.3% 96.2% 96.7%
test damage 113 12 90.4%
injury/fatal 9 652 98.6%
overall percent 85.4% 95.2% 97.3%
Tab.6  Classifications in MLP model
Fig.1  ROC curve of MLP model.
Fig.2  Independent variable importance chart in MLP method.
variable importance normalized importance
accident time 0.085 33.9%
accident day 0.078 31.2%
accident season 0.131 52.5%
road surface condition 0.050 19.9%
daylight condition 0.086 34.4%
type of vehicle accident 0.135 53.9%
driver age 0.063 25.1%
driver gender 0.054 21.5%
weather condition 0.068 27.0%
cause of accident 0.250 100.0%
Tab.7  Independent variable importance for MLP model
samples observed predicted
damage injury/fatal correct percent
training damage 228 71 76.2%
injury/fatal 96 1456 93.8%
overall percent 71.2% 91.8% 92.1%
test damage 94 17 84.6%
injury/fatal 19 621 97.0%
overall percent 81.2% 91.5% 95.4%
Tab.8  Classifications in RBF model
Fig.3  ROC curve of RBF model.
Fig.4  Independent variable importance chart in RBF method.
variables importance normalized importance
accident time 0.084 30.1%
accident day 0.043 15.6%
accident season 0.075 27.0%
road surface condition 0.082 29.4%
daylight condition 0.085 30.5%
type of vehicle accident 0.116 41.8%
driver age 0.074 26.7%
driver gender 0.079 28.5%
weather condition 0.084 30.1%
reason of accident 0.278 100.0%
Tab.9  Independent variable importance for RBF model
methods model prediction accuracy (%) three most important factors
MLR 84.7 1. not paying attention to the front
2. vehicle-motorcycle/bike
3. violation to left and right
MLP 96.7 1. reason of accident
2. type of vehicle accident
3. accident season
RBF 92.1 1. reason of accident
2. type of vehicle accident
3. daylight condition
Tab.10  The comparison of the models used in this research
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