Dr. Ruey Long (Kelvin) Cheu graduated with a B.Eng.(Civil) degree with First Class Honor in 1987 and M.Eng degree in 1990 at The National University of Singapore (NUS). He earned his Ph.D. degree in Transportation Systems Engineering at the University of California, Irvine in 1994. He was a tenured faculty member at the Department of Civil Engineering at NUS until 2006 when he joined The University of Texas at El Paso (UTEP). He is currently a full Professor (with tenure) in the Department of Civil Engineering at UTEP. He is a Professional Engineer in the State of Texas, USA, and a Fellow of the American Society of Civil Engineers. Dr. Cheu's diverse expertise includes Intelligent Transportation Systems (ITS), traffic operations, highway geometric design, transportation planning and transportation security. His research/project portfolio includes projects funded by the Shell Petroleum, Honda Motor Company, Land Transport Authority of Singapore, Maritime and Port Authority of Singapore, Ministry of Defense (Singapore), Texas Department of Transportation, El Paso Metropolitan Planning Organization, U.S. Federal Highway Administration, U.S. Department of Homeland Security, City of El Paso, U.S. National Science Foundation, and Partners of the Americas Foundation. Dr. Cheu has been teaching CE4340 Transportation Engineering, an introductory 3-semester-credit-hour course in the ABET-accredited Bachelor of Science in Civil Engineering program at UTEP since 2006. This book is a compilation of his teaching materials which have been revised/updated numerous times over the past years.