Have an attendance code? Sign In to enter it. Thank you for joining us! We hope to see you in the ITE Learning Hub again soon. Contributors Mojtaba Mohammadi Mojtaba Mohammadi is currently a Traffic Safety Engineer at Arkansas DOT. He received his PhD in Transportation Engineering from the Missouri University of Science and Technology, in 2014. His PhD dissertation was on the subject of safety performance functions development using crash frequency data. During his career as a safety engineer in Arkansas DOT, he has worked on several subjects in local and statewide safety management including network screening, hot spot analysis, crash countermeasures, benefit-cost analysis, and prioritizing safety improvement projects.