As the tempo increased, Brodsky found drivers ran more risks, such as jumping red lights, and had more accidents. When listening to up-tempo pieces, they were twice as likely to jump a red light as those who were not listening to music. And drivers had more than twice as many accidents when they were listened to slow or medium-paced numbers.Brodsky concedes that behavior on a simulator may not translate into the same behavior on the road. "But i think it's got to be taken seriously," he says