"Οδικών σημαντικών" refers to significant roads or highways that play a crucial role in transportation and connectivity within a region. These roads facilitate the movement of people and goods, linking cities, towns, and rural areas. They are essential for economic development and accessibility. In many countries, such as Ελλάδα, these important roads are often maintained by government agencies to ensure safety and efficiency. They may include major routes like Εθνικές Οδοί and Αυτοκινητόδρομοι, which are designed to handle high traffic volumes and support various modes of transport, including cars, trucks, and public transit.