Agreed, it happens to human drivers too. It's on whoever carried out the roadwork to follow the regulations, although if a self-driving car was somewhat smarter it could avoid poured concrete.

The car is just too deep into the enclosure for you to see it, here's an angle that shows that.

Here's the original source.

Hell, in my pedestrian days I stepped in some wet concrete on the way to the bus. I took a different path to the bus after that, since I was super spottable with my fully checkered clothing.