Comment by urbandw311er

The next big advance after A* is something called [contraction hierarchies](https://en.m.wikipedia.org/wiki/Contraction_hierarchies)

I’d love to see a “part 2” of this resource or similar that explains those in this kind of Laymans terms. There were some white papers but then I suspect the big tech companies started to guard this research a little more closely once its potential to give a commercial edge became apparent.