For U.S. motorists in any parts of the million-square-mile area under the heat dome of 2011 – with temperatures in the 90s and 100s (Fahrenheit), and heat indices 20 and 30 points higher in some places – there’s more to worry about than engine coolant and functioning air conditioners. Add exploding potholes to the list.
Actually, it’s pavement that is exploding, leaving potholes in its wake. This largely occurs with asphalt roads. Where concrete slabs are used in highway construction, the danger is buckling, as when one-ton chunks of concrete push upward due to the expansion effect of heat, creating dangerous steps and ramps in the roads.Read More