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The track between Pequot, Illinois and Fort Madison, Iowa is governed by automatic train control. This is one of the relay…
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The track between Pequot, Illinois and Fort Madison, Iowa is governed by automatic train control. This is one of the relay boxes. The number "1051" stands for the first relay box in the 105th mile from Chicago. Sourced from the Library of Congress.

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The track between Pequot, Illinois and Fort Madison, Iowa is governed by automatic train control. This is one of the relay boxes. The number "1051" stands for the first relay box in the 105th mile from Chicago. Sourced from the Library of Congress.

More