Image of an automatic flashing light installation (AKI) at an unguarded railway crossing at This concerns the first railway crossing in the Netherlands that was automatically protected with such a flicker light installation. Its experiment was put into service on December 29, 1936 (see rail and tram roads, Jan. 5, 1937, p. 11).

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Photo credit: © EU/BT / Alamy / Afripics
License: Licensed
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