Greenville didn’t allow blacks inside the city limits after dar until the 60’s...or that’s what was said.
I'm fairly old (see my prior post about Baltimore) but I didn't move to Texas until years after the Greenville sign (on highway 67) was removed. An acquaintance of mine (around my age) who was from Hunt County explained that the sign was just a point of pride about the rich soil up there and had no intent to be racist in any way.
That said, I do remember "Colored" restrooms, water fountains and waiting rooms. And believe me, they certainly weren't only in the South. Having lived in both the Yankee region and here in the South, relations between the races are far better here and certainly less strained.