article_snippet: Electric cars and hybrids running under electric power move silently and are likely to surprise people on foot who expect to hear the approach of a vehicle.
article_snippet: Car builders and independent companies have been working on a range of artificial sound generators that would lessen the risk of accidents.
article_snippet: Most involve speakers fixed to the car, which work in the direction the car is moving to reduce nuisance to people who are not in the way.
article_snippet: Sounds promoted vary from a reproduction of the whine of an old electric motor through computerised squawks to a rumble reminiscent of a diesel or petrol combustion engine.
article_snippet: EU rules say such generators must be fitted to quiet cars by 2021, but Guide Dogs said that before then there will be thousands more potentially dangerous green cars on the road.
article_snippet: ‘It is terrifying to cross when you are unable to hear quiet hybrid and electric vehicles. 
article_snippet: Ensuring all quiet vehicles
article_snippet: have sound generating systems installed and switched on would ensure that millions of people, like me, who are living with sight loss, would be protected from the growing safety hazard.
highlights_snippet: Campaigners are calling for compulsory noise generators on electric cars .