I understand that the red, yellow and green lines give a general idea of how bad traffic is on a road, but do they have any specific meaning, like red equals a 40-minute wait at a toll bridge? a. According to the Google Maps site, the colored lines representing traffic conditions on major highways refer to the speed at which one can travel on that road.
The oldest form of writing known to man is Cuneiform used in Mesopatamia.
The Invention of Writing. The oracle bone inscriptions are the oldest known form of Chinese writing. By comparing and equating the inscriptions to modern Chinese characters, scholars have shown that the Shang had already developed all the principles of the modern writing system used today.