The London School of Hygiene and Tropical Medicine has found that pedestrians are twice as likely to be hit by an electric or hybrid car than by a gasoline- or diesel-powered vehicle. The scientists have hypothesized that the relatively quiet operations of an electric vehicle as well as high pedestrian density in noisy urban areas could be major reasons. The study uncovered a pedestrian casualty rate of 5.16 per 100 million miles driven for electric and hybrid vehicles, more than double the 2.4 per 100 million miles recorded for traditional gasoline-powered cars.