Guerilla Public Service. If you've not heard of Richard Ankrom who fixed an exit sign on the 110 freeway, check it out. He made a documentary about it (and there are countless other videos on YouTube covering the story).
Ya, that's fair, and very noble of you. I think this sort of thing is often the divide between engineering and politics. Engineers want to do the thing. Politicians want to make it easier to do the thing. I realize those are loose definitions, and I'm just some internet guy, but I like my definitions. As you get promoted, you move away from engineering, and further into politics. Personally I don't have the patience for much politics, even though i recognize that it is good and important.
All that to say -- I think you should be promoted :)
https://youtu.be/Clgl63CWOkM?si=CZQEzUsY9gWjWbLU
He did it so well, the modification stayed in place for years.
If you can do it right, I say go for it.