Persian royal road

Constructed around 500 B.C. by Darius I, the Persian Royal Road spanned 1,600 miles, connecting Susa to Sardis. It featured mounted couriers who could cover the distance in about a week. This relay system greatly enhanced message transmission speed across the Persian Empire. The Royal Road’s efficiency mirrors the relay systems in amateur radio, where repeaters extend communication ranges, ensuring messages reach distant operators. The Persian innovation highlights the significance of infrastructure in effective communication, a principle amateur radio operators uphold through strategically placed repeaters and well-maintained equipment.