# Analyzing the Factors Influencing Time Delays in Korean Railroad Accidents
## 3 Data Descriptions
### Overview of Railroad Accidents in Korea
\begin{table}
\begin{tabular}{l l r r r} \hline \hline \multicolumn{1}{c}{**Types of Railroad Events**} & \multicolumn{1}{c}{**Numbers in**} & \multicolumn{1}{c}{**Numbers in**} & \multicolumn{1}{c}{**Total**} \\  & & **Year 2001–2007** & **Year 2008–2022** & **Total** \\ \hline Accidents & Train fire & 2 & 3 & 5 \\  & Crash & 6 & 17 & 23 \\  & Derailment & 24 & 85 & 109 \\  & Ground-level crossing accidents & 304 & 188 & 492 \\  & Facility breaks & 28 & 20 & 48 \\  & Facility fire & 16 & 22 & 38 \\  & Other facility-related accidents & 0 & 2 & 2 \\  & An accident involving passengers related to the train & 1724 & 792 & 2516 \\  & involving staff related to the train & 130 & 131 & 261 \\  & involving public related to the train & 1126 & 763 & 1889 \\  & An accident involving passengers not related to the train & 310 & 196 & 506 \\  & involving staff not related to the train & 781 & 537 & 1318 \\  & involving public not related to the train & 51 & 58 & 109 \\ Incidents & A high potential to develop into a railroad accident & 60 & 22 & 82 \\  & Delayed operation & 3120 & 4253 & 7373 \\ \hline Total & & 7682 & 7089 & 14,771 \\ \hline \hline \end{tabular}
\end{table} 
Table 1: Comparison of the number of railroad events by type in two different periods. The second part of Table 2 shows the average time delayed by three factors. The length of delay time appears in the following order: human factors, technical factors, and external factors. In the case of a fatal accident, the possibility of recovering from a breakdown or damage to facilities or equipment is relatively low compared to an accident caused by technical factors, so the time it takes for the train to operate normally is inevitably relatively small. However, in the case of accidents caused by environmental factors, it causes breakdown and damage to railway facilities such as tracks, structures, and vehicles. Therefore, it is estimated that accidents caused by environmental factors require more time to recover from, compared to accidents caused by technical factors, resulting in relatively longer train operation delays. Interestingly, average latency has not shown any significant decrease in length over the past 15 years. This means that, regardless of the development of railway technology, an almost certain amount of delay time will inevitably occur. \begin{table}
\begin{tabular}{c c c c c c c c} \hline \hline \multirow{2}{*}{**Year**} & \multicolumn{3}{c}{**Number of Events by Causes**} & \multicolumn{3}{c}{**Delay Time in Average (Minute)**} \\ \cline{2-9}  & **Human** & **Technical** & **External** & **Total** & **Human** & **Technical** & **External** \\ \hline
2008 & 447 & 257 & 0 & 704 & 48.0 & 36.4 & 0.0 \\
2009 & 419 & 286 & 1 & 706 & 26.3 & 30.1 & 83.0 \\
2010 & 353 & 248 & 31 & 632 & 24.8 & 37.0 & 47.5 \\
2011 & 292 & 306 & 29 & 627 & 20.6 & 34.1 & 24.5 \\
2012 & 277 & 289 & 23 & 589 & 21.0 & 31.7 & 30.7 \\
2013 & 258 & 267 & 29 & 554 & 17.0 & 34.7 & 29.0 \\
2014 & 233 & 206 & 49 & 488 & 26.1 & 34.0 & 31.5 \\
2015 & 166 & 187 & 40 & 393 & 34.0 & 28.9 & 32.5 \\
2016 & 168 & 160 & 42 & 370 & 23.8 & 33.9 & 43.0 \\
2017 & 127 & 195 & 40 & 362 & 28.3 & 31.8 & 31.6 \\
2018 & 112 & 173 & 46 & 331 & 26.7 & 32.5 & 49.7 \\
2019 & 100 & 265 & 56 & 421 & 24.1 & 32.6 & 28.8 \\
2020 & 71 & 194 & 40 & 305 & 25.5 & 32.8 & 33.6 \\
2021 & 96 & 163 & 41 & 300 & 14.8 & 38.3 & 41.0 \\
2022 & 125 & 154 & 28 & 307 & 23.0 & 51.0 & 87.4 \\ \hline Total & 3244 & 3350 & 495 & 7089 & Avg. 27.2 & Avg. 34.3 & Avg. 38.6 \\ \hline \hline \end{tabular}
\end{table} 
Table 2: Number of events (incident, accident) and time delayed. Figure 3: Number of significant accidents of UIC members in 32 different countries (see page 27 of the UIC Safety Report 2023).