The culture of Bhutan is like none other in the world; the small nation's policy of isolationism until the mid-twentieth century has kept ancient traditions alive to this day. There is not a single traffic light in Bhutan, or a road with more than 2 lanes, and the country was without TV and internet until 1999. This idiosyncratic mixture has led to the robust preservation of a the Bhutanese identity. The valleys across the country each have their own local rituals which weave into the greater context of the national culture.