The secret meaning behind those yellow numbered signs along Sydney train tracks

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The secret meaning behind those yellow numbered signs along Sydney train tracks
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Sydney rail passenger will likely recognise these thin, yellow, numbered signs. But many may not understand their meaning. SydneyTrains 7NEWS

Regular Sydney commuters will likely recognise the thin, yellow, numbered signs stuck along the train lines, but might not understand their meaning.Watch the video above for the disturbing discovery on a NSW trainAn overhead wiring structure label’s alphanumeric code is made up of a prefix with one to three letters, followed by a number.

The “+” symbol sits in place of a decimal, and will always be followed by three digits - any digits after are truncated. The secret meaning behind the alphanumeric sign punctuating Sydney train lines has been revealed - it’s an orienting marker noting the line and kilometres to Central Station.While they are designed for staff to easily locate points along the train line which require maintenance and the like, they can provide a fun game for travellers who forgot their book or let their phone die.

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