Don't stumble up my driveway in the twilight, especially if you've had a couple.
That is a tree root. Tree (neighbors) is long gone
Recently bought this place and the 15 foot wide concrete driveway was buckled . I started to repair it. Boy do I have a problem. That bulge in the "belly" is 18 - 20 inches thick and right up against the next section of concrete. Concrete is raised about 8 inches. I'm going to ruin some saw blades. Then I get to flip over the other half of the concrete and do it again. Don't know yet how I'm going to get under the root. Root does extend under the house.
Wish me luck and lots of ingenuity.