There comes a time in the life of every asphalt driveway when it needs to get a hot new coat. Over the years, sun, wind, rain, heat, and cold have done their part to transform it from black and beautiful to gray and pitiful. Sometimes, however, you can't tell how far gone your asphalt driveway is just by looking at it. You need to test it. To see whether your blacktop needs resurfacing, pour a bucket of water on it on a hot day while the sun is out. If the surface water evaporates but leaves a dark ring on the blacktop that takes much longer to dry, the water has soaked in and you need to resurface.