1 Paris metro authority 2 Source : http://www.alstom.com/products-services/product-catalogue/rail-systems/signalling/products/urbalis-400/

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3 system is here considered in its widest definition

4 CBTC or ETCS configuration data, IXL or RBC parameters, etc. 5 For example, “successive track circuits should have continuously increasing kilometer points”, “there exists a path between two distinct track circuits”, “signals should be positioned a minima 100 meters before the switch they protect”, etc.

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