What is the main characteristic of a cloverleaf interchange?

A cloverleaf interchange is designed to facilitate the smooth flow of traffic between two highways by allowing vehicles to transition between them without coming to a stop. The main characteristic that defines a cloverleaf interchange is its multiple entry and exit points that utilize loop ramps. These loops allow for continuous flow and help to minimize conflicts between vehicles turning left and those on the through road.

Drivers can enter and exit the highways seamlessly as they navigate through the curved ramps, which is particularly beneficial in reducing the likelihood of collisions and improving overall traffic safety. This design effectively enhances capacity, as it allows for high volumes of traffic to change highways without significant delays. Other features, such as the two levels of traffic or the presence of limited access, are important but secondary to the primary function of providing multiple points of entry and exit efficiently within the design.