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History: Construction of Tower Bridge, 1886-1894, London, England, United Kingdom
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History: Construction Of Tower Bridge, 1886-1894, London, England, United Kingdom

If a black ball was suspended from the middle of each walkway (or a red light at night) this indicated that the bridge could not be opened. These signals were repeated about 1,000 yards (910 m) downstream, at Cherry Garden Pier, where boats needing to pass through the bridge had to hoist their signals/lights and sound their horn, as appropriate, to alert the Bridge Master.
Some of the control mechanism for the signalling equipment has been preserved and may be seen working in the bridge's museum.

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Filename:437741.jpg
Album name:Architecture & Design
Rating (1 votes):55555
Keywords:#history #construction #tower #bridge #london #england #united #kingdom
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Date added:Nov 30, 2011
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