Extremely cool. I hand rolled some 3d objects using only CSS a few years ago [0]. One challenge I faced with the rotation was that text on the stop and bus signs would appear backwards from behind. To solve this I added an animation that flips the div 180 degrees. I tried to do the flip while the signs were occluded, but I didn't add anything to occlude the bus stop sign so you can see it flip as it rotates
[0]: https://jteration.github.io/city-block/