Interstate exits are points of departure from a highway, usually marked by a sign. The term 'interstate exit' is composed of two words: RAMP (4 letters) and OFFRAMP (7 letters). A RAMP is a sloped road that connects two highways at different levels, while an OFFRAMP is the portion of the highway that leads away from the main road. Together, these two words form the term 'interstate exit, ' which is used to describe the point of departure from a highway.