Below grade makes sense for sound damping and safety. (Crashes can only go so far before hitting dirt)
Detroit doesn’t get nearly as much snow as Buffalo.
Baltimore has a false start freeway that goes nowhere. A cop told me that he loves chases where the idiot goes there. The road has a particular bump that is guaranteed to cause a spin out at 80 mph or above.
They just roll behind and laugh.
If that’s the one I’m thinking of, it used to be a section of I-170, before it was decommissioned and re-signed as US 40. I-170 would have been a spur going from an also-non-existent section of I-70 into downtown.