Creative Concept

Concept cars never go into production directly; in modern times all would have to undergo many changes before the design is finalized for the sake of practicality, safety and cost. A "production-intent" vehicle, as opposed to a concept vehicle, serves this purpose.
Design
Concept cars are often radical in engine or design. Some use non-traditional, exotic, or expensive materials, ranging from paper to carbon fiber to refined alloys. Others have unique layouts, such as gullwing doors, 3 or 6 (or more) wheels, or special abilities not usually found on cars. Because of these often impractical or unprofitable leanings, many concept cars never get past scale models, or even drawings in computer design. Other more traditional concepts can be developed into fully drivable (operational) vehicles with a working drivetrain and accessories. The state of most concept cars lies somewhere in between and does not represent the final product. A very small proportion of concept cars are functional to any useful extent, some cannot move safely at anything above 10 mph.