Egnatia Odos is an ancient Roman road that connected the western part of Greece to the eastern regions, including Thessaloniki and Byzantium. It played a crucial role in trade and military movement, facilitating communication across the Balkans and into Asia Minor. Today, the modern version of Egnatia Odos is a major highway that runs through northern Greece. It enhances transportation and economic development, linking key cities and regions, and is vital for both local and international travel. The road remains a significant part of Greece's infrastructure.