Half ass stabilizing slope. One track sinks lower than the other. Track is now uneven, and no trains can run on it. Now pay $1b to level and stabilize slope

I mean, if these are caused by sinkholes, then that should have been addressed during construction. Roads can be very thick and are made of lots of different layers, each of which should be compacted very regularly and thoroughly during construction. If sink holes are common in the area, then they should have designed countermeasures to minimize their impact. My understanding of sinkholes, is that they typically form due to water phase erosion, which again, should have been known and at least partially accounted for. But, hey, I’m not a civil engineer, so I could wrong, but those definitely seem more likely to be potholes as opposed to sinkholes.

Road builder here. Nope, unless you are being very creative with the term 'sinkhole'.

First clue - a sinkhole propagates from UNDER the road, whereas the photos simply show crap asphalt which has been essentially 'plucked' out. This suggests either a crappy binder, or it was placed in the rain, or a number of other quality issues.