What is Controlled Manual Block?

July 16, 2019, 1:01 PM
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Controlled Manual Block is a system where a manually operated block instrument is used for obtaining the Line Clear permission from the station in advance; however, the clearance of the section must first be verified through track circuiting. The block instrument is connected to the track circuits, and it is not possible for Line Clear to be granted unless the track circuits verify the entire block section to be clear of obstruction. Axle counters can be used instead of track circuits as well.

Source – IFRCA.org

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