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.
Cuneiform writing was humankind's earliest form of writing. Created in Mesopotamia, an ancient civilization between the Tigris and Euphrates rivers in modern-day Iraq, sometime around 3000 BC, cuneiform was based on earlier pictographs.