In June 2010, the FAA granted Terrafugia an exemption for the Transition's extra takeoff weight. The added weight accommodates the Transition's road safety features, which is needed to comply with Federal Motor Vehicle Safety Standards. On June 29, 2011, the National Highway Traffic Safety Administration also granted exemptions allowing the Transition to use a polycarbonate windshield, to use tires suited for highway and aircraft use but not typically certified for multi-purpose vehicle use, to not include an electronic stability control system that could inadvertently cut engine power during flight, and finally, to use regular instead of advanced airbag deployment.