A road interchange is a junction where two or more roads meet, allowing vehicles to switch from one road to another without stopping. These structures are designed to improve traffic flow and safety by minimizing the need for traffic signals or stop signs. Common types of interchanges include cloverleaf, diamond, and trumpet designs, each serving different traffic patterns. Interchanges often feature ramps that connect the roads at different levels, which helps to reduce congestion and prevent accidents. They are typically found at major highways and urban areas, facilitating efficient travel for both local and long-distance drivers.