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… to wayside systems could be intercepted and used for physical terrorist attacks. Examples of attacks on … while the UK and US have published cyber-security guidance for critical infrastructure (including railway … Canada released two documents: the National Strategy for Critical Infrastructure and Canada’s Cyber Security …
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… and Interlocking Signals 405. Clear - Proceed. 1. A high mast, single aspect signal displaying green. 2. A high mast, staggered, double aspect signal displaying green on the top, red on the bottom. 3. A high mast, inline , double aspect signal, displaying green on …
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