My name is Yohan Chang. I have more than 10-years experiences for the research of Transportation Engineering area. My B.S. and M.S. degrees civil Engineering in Chonnam National University, S. Korea. Now, I`m pursuing my PhD. degree in civil engineering in University of Missouri - Columbia. My research interests include; intelligent transportation system, evacuation, Naturalistic Driving Study, demand modeling and simulation, traffic flow theory, machine learning, Twitter API, and etc. ©