Interchange design refers to the planning and layout of road junctions where multiple roads meet, allowing vehicles to switch from one road to another. This design aims to improve traffic flow, reduce congestion, and enhance safety for drivers and pedestrians. Common types of interchanges include diamond, cloverleaf, and trumpet designs, each suited for different traffic patterns and volumes. Effective interchange design considers factors such as vehicle speed, sight distance, and the number of lanes. Engineers use traffic studies and simulations to determine the best configuration, ensuring that the interchange can accommodate current and future traffic demands while minimizing delays and accidents.