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The (European) railway network includes all the tracks, stations, lines, and terminals necessary to schedule and run the trains (i.e. the "geographic" network).
An IM manages a geographically defined subset of the railway network, called an infrastructure, which includes also the signaling, overhead wiring, ICT systems, regulations etc. necessary for the RUs to access the railway network.
Relationships:
• A network consists of one or more infrastructures.
• A network is a collection of one or more lines and nodes.
• A network may contain one or more infrastructure corridors
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