Rouge Plant Noon Whistle? Or Something Else?

Not exactly in Detroit proper, and hardly the most burning question, but...

I have occasion to be in Dearborn every now and then at the noon hour. Often, I will hear a deep whistle sounding at the stroke of 12:00. I thought it might be the Rouge Complex signalling for lunch or somesuch, but that seems a little far away. I'm usually in the area of Michigan Ave and Outer Drive when I hear it. Does the City of Dearborn have a "noon whistle" I don't know about? I've searched the internet pretty thoroughly on the topic to no avail. I'm certain it isn't the steam locomotive whistles from Greenfield Village.

So...what the heck am I hearing?

Possibly the Amtrak train that goes through Dearborn around noon.

Quote:

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Originally Posted by jackie5275

Possibly the Amtrak train that goes through Dearborn around noon.

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Definitely not Amtrak. I'm usually right next to the tracks when that train goes by, and as a railroad buff I'm familiar with the various horns and whistles. What I'm hearing is more distant and sustained, perhaps 5-10 seconds in duration. It's got to be a factory whistle or municipal time signal, I'm just not sure whose.