The 13th COTA International Conference of Transportation Professionals (CICTP 2013) took place in Shenzhen, China on August 13-16, 2013. The conference addressed the critical issues and challenges in the evolution of modern, intelligent multimodal, and sustainable transportation system, as well as its interactions with social, economic, land use, and natural systems. The papers in these proceedings address a wide range of topics in the following fourteen areas: 1). Intelligent, integrated, and sustainable transportation system planning and development. 2). Transportation economics and policy. 3). Land-use and transportation planning and systems modeling. 4). Traffic operation, control, information and management. 5). Travel behavior and demand analysis. 6). Transportation safety, emergency response management, and security. 7). Public transportation including bus and rail. 8). Transportation infrastructure design and construction. 9). Pavement and materials engineering, and highway maintenance. 10). Freight and logistics. 11). Vehicle technology, vehicular networks and vehicle infrastructure integration. 12). Air transportation. 13). Water-borne transportation. 14). Energy, environmental, and climate change issues related to transportation