International Conference on Transportation Infrastructure and Materials (TIM) is an annual international academic conference in the field of transportation infrastructure and materials. With its rigorous academic atmosphere and high academic level, TIM leads the research and development in the field of transportation infrastructure and materials, and has attracted worldwide attention. TIM is initiated by the International Association of Chinese Infrastructure Professionals (IACIP). IACIP is a non-profit professional organization registered in the United States. The members are mainly engaged in the research of civil infrastructure systems and related fields. The previous TIMs were organized by IACIP with Chang'an University, Qingdao University of Science and Technology, Hebei University of Technology, Shandong University and Shandong Jiaotong University. The Fifth International Conference on Transportation Infrastructure and Materials (2020 TIM) will be held in Changsha on July 2nd-3rd 2020, co-sponsored by IACIP and Changsha University of Science & Technology (CSUST). CSUT is a multi-disciplinary university with main focus of engineering and have including other disciplines such as science, management, economics, literature, law, philosophy and art.