Table 8.

Examined and optimized hyperparameters for harsh braking/100 km XGBoost algorithms.

Hyperparameter	Examined range	Optimized Value
Learning rate	0.001–0.6	0.374
Gamma	0.001–10	1.37
Maximum tree depth	2–10	6
Minimum child weight	1–10	1
Number of rounds	1–250	242
Mean Squared Error	as low as possible	0.018