The Persian Royal Road was an ancient highway built by King Darius I in the 5th Century BCE to facilitate communication throughout his empire. The route, reconstructed using archeological research and historical records, passed through present day Turkey, Iraq, and Iran. The Greek historian Herodotus’ praise for the speed of the Persian couriers, who were said to be able to travel the road’s 1,677 miles (2,699 kilometers) in seven days, is popularly associated with what US public service? Discuss
Source: The Free Dictionary