Will our future highways be paved with solar gold?  Solar Roadways, a small Idaho start-up, just got a $100,000 grant to produce a prototype for its Solar Road Panel, a system of solar panels that could one-day turn roadways and parking lots into energy generating power sources.  The panels could contain embedded lighting systems for lines and signage, sensors to warn of animals or objects in the road, heaters to melt snow and ice and enough potential energy production to make a major contribution to the power grid.  Great idea.  We’ll see…