The Netherlands has one more thing to be proud of, being one of the very few, if not the very first, to boast of something called a "Smart Highway". No, this has nothing to do with mobile devices or wireless technology. It's about being smart about road safety and being smart about energy consumption, especially at night. How? By designing highways, or to be more precise, paint, that will soak in solar energy during the day and then paint the night, or the road, green at night.