Exploring the Mechanism of Crashes with Autonomous Vehicles Using Machine Learning

Table 2

Methods and significant factors in previous studies.

Study	Variables used in the studies	Analysis methods	Significant factors
Wang and Li [6]	Crash severity, collision type, roadway characteristics	CART models	Location (highway), accident liability
Xu et al. [5]	Type of intersection, type of collision, roadway characteristics, weather	Binary logistic regression model	Driving mode, collision location, roadside parking
Boggs et al. [7]	County, test year, time of the day, vehicle state, type of crash, crash severity	Hierarchical Bayesian heterogeneity-based model	Weather condition
Chen et al. [8]	Crash severity, collision type, weather, vehicle damage, accident location, weather, vehicle state, land-used data	XGBoost model	Weather condition, location (intersection)