The Siren Board

Discussion of Outdoor Warning Systems
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PostPosted: Thu Jun 16, 2022 4:23 pm 
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I’ve been looking at drawbridges for traffic lights and sirens, and a lot of them have speakers on them. What are they used for?

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PostPosted: Thu Jun 16, 2022 7:50 pm 
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Most of the time they sound for when the bridge moves
Like at the Fort Maddison Swing Bridge in Iowa, they have 2 Sentry F-2 that sounds when the bridge moves.
Hope that helps!

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PostPosted: Sat Jun 18, 2022 12:55 pm 
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SentrySterling wrote: *
Most of the time they sound for when the bridge moves
Like at the Fort Maddison Swing Bridge in Iowa, they have 2 Sentry F-2 that sounds when the bridge moves.
Hope that helps!
Thank you! Do you have a video of this?

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Owner of a Model L, Federal explosion proof siren, and lots of traffic lights. Autistic, non binary, and gay.

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PostPosted: Sat Jun 18, 2022 6:36 pm 
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Fort Madison timestamp is 2:14
https://www.youtube.com/watch?v=1k7ZVLo07yA
Here's also a video of the Interstate bridge as well
https://www.youtube.com/watch?v=fmJAWxwvpPo.

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