The language of roads

Looking through my photo archives for June, a decade back, I realized that I passed through Nice. I’d taken a lot of photos that clutter up tourist’s hard disk. But among them I came across this photo of the road seen as a black board. When we walk or drive we read the road in more senses than one: not just watching and reacting to traffic and pedestrians, but also to signs, many of which are written on to the surface of the roads. But looking at them from top makes everything look different. Are these markings a language? Like language they are arbitrary signs to which we give meaning. A dashed line means something different from a continuous line. Some combinations of dashed and continuous lines are allowed, some not; these are rules of grammar, and they can be different in different countries. Interesting, where your mind can wander if there are no warning signs to prevent it from meandering.