The term HIGHWAY SIGHT is composed of four words: SEMI, AUTO, CAR, and SIGN. A SEMI is a large truck with a trailer attached, often used to transport goods over long distances. An AUTO is a vehicle that is powered by an engine, such as a CAR or truck. A CAR is a motor vehicle with four wheels, used for transportation. A SIGN is a piece of paper, metal, or other material that displays information, such as a warning or direction. All of these items can be seen on highways, making them part of the highway sight.