The tracks of the Swiss Federal Railways are currently divided into new block sections to enable a tighter railway service. This requires the installation of additional signals and technical facilities. These counters register the incoming and outbound train axles of a section to recognize whether it is available or used. Staad, Switzerland, May 11, 2011.
<a rel="nofollow" class="external text" href="https://www.flickr.com/people/70981241@N00">Kecko</a>
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