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June 17th – At Spring Road station in Birmingham, I overheard to…
365 days of biking 17 Jun 13

June 17th – At Spring Road station in Birmingham, I overheard to travellers discussing the white plates visible on the the edge of the opposite platform, down beside the track.
They often baffle station users, and their usage is a bit obscure, really. These are merely a datum survey marker for when the rails are replaced and the track relayed, which happens more often than one would imagine. Before the old track is moved, a surveyor uses a laser…
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