Around that time, General Motors had equipped a small fleet of cars with airbags and Dinesh did research that showed positive safety benefits for airbags in this fleet of cars. His study compared three groups of real-world frontal crashes: those in which front-seat occupants were using no restraints, those in which they were wearing lap/shoulder belts, and those in which they were automatically restrained by airbags. These comparisons of the injuries sustained by front-seat occupants in real-world crashes confirmed the laboratory testing results which had indicated that airbags could offer better protection in frontal crashes than lap/shoulder belts when worn and substantially improved protection over no restraint.