Now, does it apply to jumping movement, as well ... if so, that's going to make things interesting, as it should not be more difficult to land on a concrete pad, than on dirt, etc .... and if it doesn't, then city fighting is going to be a pack of pogo-bunnies hopping from backyard to grass, or on buildings, only, as they are not pavement, and you won't skid landing on one. I might consider this a need for an errata, as it is going to create odd, or very different results in play ...
Now, mind you, I am a combined arms guy, so encouraging vehicles in cities works for me, but I do see a lot of frustration with this one.
Nahuris