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 form of writing. The earliest writing we know of dates back to around 3,000 BC and was probably invented by the Sumerians, living in major cities with centralised economies in what is now southern Iraq.