This repository serves as the supplementary materials for the manuscript Modeling safety-critical events using trucking naturalistic driving data: A driver-centric hierarchical framework for data analysis, which has been submitted to a journal. The website can be visited at https://caimiao0714.github.io/500TruckStudy/. It is created and maintained by Miao Cai. He can be contacted via Email miao.cai@outlook.com.