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 Chinese Writing System. The Chinese writing system developed more than 4,000 years ago; the oldest extant examples of written Chinese are from the 14th or 15th cent. B.C., when the Shang dynasty flourished.