Rail transportation includes intercity rail transportation and urban rail transportation. Information technology is indispensable for the development of rail transportation. This paper first gives the architecture of rail transportation information technology, and puts forward the structure of rail transportation information industry based on it. In this paper, rail transportation information industry is divided into communication industry, Signal industry, vehicle information industry, power monitoring industry, environmental control and fire alarm industry, automatic fare collection industry, operation and management system industry. Then from the two aspects of railway and urban rail transportation, this paper analyses each industry chain in the rail transportation information industry.
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