Tightening regulations on fuel economy, along with rising awareness about pollution, have influenced vehicle design and function in recent years. However, most consumers are not willing to sacrifice comfort, vehicle size, or power, so auto makers needed to use different methods to boost fuel economy. For the most part, aerodynamics can be directly related to fuel efficiency. The smoother air flows over the vehicle, the less power is required to make the vehicle move, leading to higher fuel economy. Unfortunately, a vehicle that has excellent aerodynamics may not be a functional vehicle for everyday consumers so other measures needed to be taken.