Historically, fuel economy regulations have been an effective mechanism for improving vehicle fuel economy and reducing greenhouse gas (GHG) emissions associated with fuel combustion. Through model years 2004 to 2014, CO2 emissions decreased by 95 grams per mile (g/mi), or 21 percent, and fuel economy increased by 5.0 mpg, or 26 percent.1 These improvements were achieved mainly through the development and implementation of new engine technologies. As regulations become even more stringent, however, automakers are looking to additional solutions, such as reducing vehicle weight. In anticipation of these requirements, the steel industry accelerated introduction of advanced high strength steels (AHSS) in the 2000s and continues to introduce new AHSS grades with improved properties. These new materials offer not only higher strength, but higher formability, both of which enable vehicle weight reduction. Importantly, these new materials have the advantage of "still being steel," meaning their production generates comparatively fewer GHG emissions than alternative materials and they are 100 percent recyclable across steel grades.