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 is in Sumer (or Sumeria), where we now have evidence of a long pre-history of writing. After early pictograms, the writing system that emerged, cuneiform, is named after the wedge shapes that were made by reed pens on clay tablets.