While I am happy about their efforts, it's interesting that in the bottom left image of their example I can clearly see another unlabeled car in the lower left half (standing at the sidewalk of the street). Also, I am not sure, but it seems like there's a cyclist on the sidewalk, visible between the stroller and the car (the wheel and hands are more clearly visible). The google image marks a car and a few pedestrians, but completely misses the traffic lights at the junction.

So I guess even their fixed dataset still misses many labels, if already their showcases miss some.