Shell Eco-marathon is a worldwide competition organized by the Royal Dutch Shell company, its main objective to encourage students to build energy efficient cars; students work to design and build a car that can be driven for the farthest distance with the least amount of energy consumption. Engineering students achieve this through dramatically reducing the weight of the car, tuning and optimizing the power-train, and designing the car in a way that has minimal drag. In addition, students work to recover the energy used in stopping the car and recharge the battery by that energy a technology known as Regenerative braking. Also, they are working to transform the car to be autonomously driven. The students use very advanced materials in the construction of the car like carbon fiber and kevlar; a material that is mainly used in the construction of space rockets and aero-planes.