O-Highways, or Overhead Highways, are elevated roadways designed to reduce traffic congestion and improve urban mobility. These structures are built above ground level, allowing vehicles to travel without interfering with surface-level activities, such as pedestrian movement and local businesses. Typically constructed using steel or concrete, O-Highways can accommodate various types of vehicles, including cars and buses. They are often part of larger transportation networks, helping to connect different areas of a city or region efficiently while minimizing the impact on the surrounding environment.