You may associate roads with Rome but in the 5th century BC the famous Persian King Darius had the Royal Road to assist in the administration of his growing empire.
The road measured around 1600 miles in length and normal trade caravans would take around 3 months to journey along it (assuming they needed to). For Darius it served as a speedy way of communicating, mounted couriers could complete the entire stretch in 7 days. This would require a change of horse and the process was known as pirradaziš which is apparently related to the modern Persian word pishtaz (‘post’).
For Darius is was a fantastic asset. The road promoted trade and allowed him to keep tabs on an empire which was multicultural to say the least.