Honestly don't see any AA in your new post unless it's somewhere I can't see it xD
the curve 1 in this pic has no AA, curve 2 does have AA. Apply this to things that tend to stick out more than they should, or to help add detail,blend something in a bit. It can also appear to fit more into an image that couldnt appear to fit with the set resolution, as you're essentially overlapping pixels into 1 offset color :o It would help things like the white outline on your street sign to appear to be a complete outline instead of white jaggies along the top and bottom of it, and the glass on your street lights appear to not be quickly drawn lines o-o. Applying to much AA tho can blur your image to much and often make it look more like a gradient.
Don't mean to pile it on or anything, but the painted marks on the road should not be completely white ._.
<3