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 earliest known writing originated with the Sumerians about 5500 years ago. Writing was not invented for telling stories of the great conquests of kings or for important legal documents. Instead, the earliest known writing documented simple commercial transactions. The evolution of writing occurred in stages.