Does anyone know what might cause a road to have a hole like this in it?
it *appears* to be a hole in the road that was taken like a core sample -- as if an engineer wanted to know the condition of the road bed beneath the pavement -- and then not properly refilled. As traffic passed over it, and perhaps erosion from rain occurred, the pavement surrounding it collapsed to make a conical depression about 12" in diameter and 6-8" deep.
it's really hard to see, and hard to see how deep it is, which is why I hit it while heeled over to the left and now have 5 ribs broken in 9 places.
More pics here... ATTGATT works.