Abstract
In recent years, California has consistently been ranked as having the highest number of motorcycle fatalities and injuries. California is the second highest state in the United States in motorcycle crashes; therefore, there is an urgent need for research of factors that impact these. The study presented in this paper investigated the main factors of motorcycle collisions in California between the years 2012 and 2020. The collected data was provided by the California highway patrol and Fatality analysis reporting system (FARS).