 Actress Shannon Doherty's died at 53. She was best known for starring in Beverly Hills 90210 and Charmed. She has spent most of the last decade battling cancer. I'm Brian Clark, ABC News. This radio commercial was made to convince you to stop speeding. We can't use siren sound effects on the radio, so we'll use other equally jarring sound effects to get your attention. Like telling you that whether you drive a little over the speed limit or a lot, you can crash just the same. You could hurt yourself or worse, others.