This is an old idea that's come up a few times and has been proven wrong everytime.

https://www.washingtonpost.com/politics/2021/11/10/robert-moses-saga-racist-parkway-bridges/

I don’t know about racist underpasses but this was the next reel when I swiped and I just thought I’d share: https://www.instagram.com/reel/C4vlUdWNUgZ/?igsh=MTVieW84bDZoZ2c2NQ==

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Robert Moses and His Racist Parkway, Explained.
The story: Robert Moses ordered engineers to build the Southern State Parkway’s bridges extra-low, to prevent poor people in buses from using the highway. The truth? It’s a little more complex.
https://www.bloomberg.com/news/articles/2017-07-09/robert-moses-and-his-racist-parkway-explained

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