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.
Sumer, an ancient civilization of southern Mesopotamia, is believed to be the place where written language was first invented around 3200 BC. Limestone Kish tablet from Sumer with pictographic writing; may be the earliest known writing, 3500 BC.