The term 'cloverleaf features' refers to a type of highway interchange that is characterized by the shape of a four-leaf clover. This type of interchange includes three main components: exits (5 letters), overpasses (10 letters), and onramps (7 letters). Exits are the roads that allow vehicles to leave the highway, while overpasses are the bridges that allow vehicles to cross over the highway. Onramps are the roads that allow vehicles to enter the highway. All of these components are necessary for a cloverleaf interchange to function properly.