That’s the built in leaf blower to make sure that the runway is clear for autumn landings. Most airports have their own de-leafing crews, but not all of them.
They were mandated to be installed after a string of landing crashes in the 90s got people making “fall” jokes too often, which upset the FAA.
This is the most sarcastic use of chatGPT I’ve ever seen in a reply. I didn’t even have to bother reading it.
10/10