How hot pavement will be is a tricky thing to predict. It depends on the surface, the material below the surface, the amount of exposure to the sun and the air temperature. There are probably other factors as well. As an example, some relatively narrow asphalt walking paths do not get as hot as the as the nearby roads. I suppose it has something to do with the differences in the thickness of the pavements, but possibly, the texture and surface as well. Many of the asphalt roads have been seal-coated many times, and so, they may have a completely different makeup from when the asphalt was first laid.
You would expect that the hottest surfaces would be those in the sun, but sometimes, a road or path only gets full exposure to the sun for a short time. Nearby buildings or trees may cast shadows, and perhaps, a pavement in the sunlight now, was previously shaded only moments ago. The centers of intersections are often far hotter than surrounding pavements, so, be careful about going diagonally across an intersection.
The reflectivity of the surface makes a huge difference, too. I say reflectivity, because sometimes color can be a little misleading. At crosswalks, I have found that the wide stripe painted to mark the crosswalk is much cooler. This, of course, depends on the line being there, and cars not being parked across it, waiting for the green.
The bottom line is, know the pavements around your neighborhood, and your running spots, really well. Barefoot running requires knowing your environment (at least the ground) much more thoroughly than other runners do. Of course, that's not a bad thing. I always thought that if more people went barefoot, that the ground (especially in cities) would stay much cleaner.