What are the two most common types of interchanges?

The two most common types of interchanges are the diamond and cloverleaf designs. The diamond interchange is often used for its efficiency in handling traffic at intersections, particularly in areas where arterial roads cross with smaller roads. It effectively utilizes ramps to allow vehicles to make turns without stopping, thereby reducing delays and improving traffic flow.

The cloverleaf interchange is another prevalent design, especially on highways. It allows for smooth, continuous movement of vehicles by providing looping ramps that facilitate turns without the need for stoplights. This design is particularly effective in areas with high traffic volumes, as it minimizes conflict points where vehicles could potentially collide.

In contrast, other types of interchanges like trumpet and stack are less common. Trumpet interchanges typically serve as connections between a freeway and a terminating road, and while functional, they are not as frequently encountered as the diamond and cloverleaf. Segmented or stacked interchanges, which manage multiple levels of traffic, are used in more complex scenarios but are less common overall because they require more space and infrastructure.

Thus, the diamond and cloverleaf interchanges are recognized for their practicality and effectiveness in various traffic situations, making them the most frequently used designs.