I'm not sure if this is the exact spot but the NYPD has these two bollards marked with traffic cones. I compared this photo to the video and I'm thinking I might be three or four bollards to the right of the exact one. But no way to know for sure.
The curbstone is maybe five or six inches at most from street level. About normal for NYC streets. The curbstone is a good 3-4 steps from the concrete bollards. Those steps were when we saw her "staggering" and had nothing at all to do with tripping over the curbstone. In fact, the video shows that she was being dragged over the curbstone - she had already started to fall before she even reached it.
Just for perspective, the North tower footprint memorial is literally steps away from this location. If you were to turn around in the picture, you would see it directly in front of you - maybe 50-75 easy steps away. So she and her entourage did not have far to walk to get to this spot.
