White roads not only do well on Christmas cards. They are also very good for the environment, which plays an important role as the reflective material does. They ensure that it is a lot less warm in the city.
There are already a number of reflective roads in North Holland, another week this week. They also try it out in Amsterdam, and since this spring you can also see them in, yes, Los Angeles. There they painted a special coating over the roads, making them white. It saved a whopping ten degrees. Dark colors absorb light, which makes it warmer. White actually fires the heat. You also notice this when wearing a white or black t-shirt in the summer.
Piet is an engineer and designs highways. He is responsible for the white roads in the Netherlands. Our summers are getting warmer because of climate change. Temperatures can rise considerably in cities in particular, because the heat is difficult to remove because of the buildings. Annoying side-effect is that more dangerous substances are being emitted by cars.
But the new roads have even more advantages. It is also safer in the winter. Just think: if you ride in the dark, you are much better visible on a white road than on gray asphalt. This means that street lighting has to be less fierce, and that also saves energy.
Reflective roads in the Netherlands look less spectacular at first glance than in Los Angeles. This is because Piet prefers not to use the coating. According to him, it wears much faster. He therefore mixes the asphalt with very fine gravel. It is called stone chips. If a lot of cars drive over it, it will wear out and the white will slowly appear. Except for using white roads, people wearing reflective vests or reflective tapes can also keep safety a night.