Why do railway level crossing barriers go down so early? - Dad Rail HD

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We look at why railway level crossing barriers go down so soon before a train arrives. The video looks at the 3 main types of level crossing. Automatic Crossings, User Worker Crossings and Controlled Crossings. We then take a brief look at British railway signalling before finally answering the question of why the level crossing barriers go down so soon before a train arrives.
Filmed on Location in July 2016
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