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Abdullah Alturki1743954
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D.Abdulkareem abduljwad
How does train signaling work?
Most signalling systems use trackside signals to control the safe movement of trains and tell drivers what to do. A colour light signal shows different colours to authorise train movements. Many have additional indicators to show which route has been set up for the train and which way it must go.
Then How is Safety Achieved?
1. Is the use of additional resources(whether hardware or software) than required for the normal functioning of the system
2. The additional resources should be configured judiciously to obtain max. the advantage in terms of safety and reliability
3. The amount and type of additional resources and their configuration will depend on the safety and reliability requirements.