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[quote user="Murphy Siding"]Now it's morphed into a PTC Cap ![/quote] It will indeed morph into PTC.  The two are converging technologies.  Ultimately, the sleep alerter function of PTC will need to monitor brain waves and other physiological data just as the currently developing advanced alerters will do in the meantime. PTC will eliminate the need to call signals because it will not depend on human response to signals.  PTC will also morph into train operation such as throttle and speed control for responding to signal indications as well as other running conditions.  Furthermore, it will make signal indications obsolete because there will be no need to visually indicate signals to trainmen.  And ultimately, there won’t be a need to monitor sleep and alertness because there will be nothing left for those deficiencies to jeopardize.
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