The goal of this project was to gain insight into the time series structure of fatal car accidents in Illinois. This study is of interest as knowing the structure of fatal accidents can help prevent them or allow responders to react to them earlier. Two large datasets were available for use: FARS (Fatality Analysis Reporting) and HSIS (Highway Safety Information System). The final model describes the number of fatal accidents by incorporating spatial information through the county and temporal information through the time when the accident occurred