In Korea, especially at Seoul Metropolitan area, there are many wide area bus traveling on expressway. Traffic accidents caused by wide-area buses traveling on expressways are very damaging to people.

In this study, to prevent large-scale accident by wide area bus, we analyzed the driving behaviors of them running on expressways. And we developed a risk prediction model to evaluate the risk of each expressway section.

For Modeling, we use the Digital Tacho-graph Data which has a driving behavior record of wide area bus. And we use traffic accident data, travel speed data, traffic volume data for 5 years on Gyeongbu expressway.