Electric and hybrid cars quietly, too quietly drive on roads. It would seem that this is bad when excessive noise pollution is observed in cities and megacities. But the US Department of Homeland Traffic Safety (NHTSA) reports that such a silent movement leads to incidents with pedestrians who cannot hear an electric car approaching due to a bend. The situation is worse with visually impaired and blind citizens. Due to their limited physical capabilities, these people are guided in space by hearing. In this regard, the agency introduced an additional requirement to the federal safety standard under number 141, according to which all manufacturers of hybrid and electric vehicles should equip cars with sound equipment that makes a sound similar to the noise of a moving ordinary car. All hybrid and electric light vehicles with four wheels and a total weight of up to 4.5 tons must be equipped with a system that emits an artificial sound warning both when moving forward and when reversing, if the speed is below 30 kilometers per hour. According to experts, when driving at high speeds, the generated noise from wheels and wind is enough for pedestrians and cyclists to perceive. September 1, 2018 is the first time that at least half of the newly-made hybrid and electric vehicles should be equipped with such systems. After that, manufacturers will have exactly one year to ensure that all their products meet the requirements. According to experts, the new measure will help prevent an average of 2,400 pedestrian injuries per year.