Based on analyzing the definition and the relevant system of REITs in China，this report discussed the positive roles and application of REITs in transportation infrastructure，and deeply researched the influenced factors about the market size of REITs in the transport sector，that included asset size of meeting REITs requirements，attitudes and decision-making factors of enterprises towards REITs，and operation and management of transportation enterprises. Then，it took expressway as an example to measure the market size of REITs. Analyzed the practices of REITs in the United States，Europe countries，Japan and Singapore，and concluded three main experiences：close relationship between development REITs and local real estate，tax neutral preferential policies driving the development of REITs market，and more stable dividends and asset value appreciation. Finally，the report puts forward some measures and suggestions of promotion REITs in Chinese transport from the perspectives of identifying the application fields and projects in the transport sector，perfecting the supporting policies，and actively and steadily promoting the pilot of REITs.