Analysis of Factors Affecting the Severity of Automated Vehicle Crashes Using XGBoost Model Combining POI Data

Table 4

Parameter tuning results.

Optimal parameters	XGBoost model	CART model
n_estimators	670	/
gamma	0.1	/
learning_rate	0.2	/
max_depth	5	4
criterion	/	Gini
min_samples_leaf	/	1