Which interchange is best suited for an expressway merging into a highway?

The trumpet interchange is ideal for situations where an expressway merges into a highway, primarily due to its design that accommodates significant traffic flow and directional changes with minimal conflict points. This type of interchange features dedicated ramps that allow vehicles to transition from the expressway to the highway smoothly, which is essential for maintaining high speeds and reducing the risk of collisions that can occur in more complex interchanges.

In a trumpet interchange, the design often allows for one roadway to terminate into another, efficiently directing traffic from an expressway to a primary highway. This helps manage the transition for vehicles that might be traveling at different speeds, ensuring a safer merging process. The design typically includes a single ramp that can handle heavy traffic volumes, making it an effective choice for locations where quick and safe changes in direction are needed.

Other types of interchanges, such as cloverleaf and diamond interchanges, while functional, can introduce more conflict points and potential delays due to tighter turns and multiple ramp movements. As a result, they may not be as effective for facilitating the specific flow of traffic between an expressway and a highway when compared to a trumpet interchange. The roundabout, while useful in many contexts for managing intersections, does not provide the same efficiency and speed necessary for the transition