And these things are very effective, it turns out — so effective that they motivate people to engage in unsafe driving behaviors, like not stopping at a red light, because that way you have to stop and restart the engine, and that would use quite some fuel, wouldn't it?
Y resulta que esas cosas son muy efectivas, tanto que animan a la gente a adoptar conductas de riesgo al volante, como no detenerse en un semáforo en rojo. Porque de ese modo hay que parar y reiniciar el motor y eso hace consumir más combustible, ¿no es cierto?