Tarrahan Parseh Transportation Research Institute International Journal of Transportation Engineering 2322-259X 1 1 2013 01 01 Application of Chaos Theory in Hazardous Material Transportation 17 24 2627 10.22119/ijte.2013.2627 EN Abbas Mahmoudabadi Ph.D. Candidate, Department of Industrial Engineering, Payam-e-Noor University, Tehran, Iran Seyed Mohammad Seyed Hosseini Professor, Department of Industrial Engineering, Iranian University of Science and Technology, Tehran, Iran Journal Article 2012 04 03 Risk factors are generally defined and assigned to road networks, as constant measures in hazmat routing problems. In fact, they may be dynamic variables depending on traffic volume, weather and road condition, and drivers' behavior. In this research work, risk factors are defined as dynamic variables using the concept of chaos theory. The largest Lyapunov exponent is utilized to determine the presence of chaos for road accident rates. Risk factors with the property of chaotic behavior are considered to solve hazmat routing problem using a developed mathematical model. Evaluation process has been done based on travel distance which mainly represents travel cost, as well as results that show the application of chaos to define dynamic risk factor appropriate method to solve hazmat routing problem, comparing to constant measures of risks. Risk Analysis Chaos Theory Hazmat routing problem transport distance and cost http://www.ijte.ir/article_2627_4de81d9105c85bca6e6e4666e6dd536a.pdf