RADS Warning Sign (image) Pensoft Publishers Share Print E-Mail Caption This is a text-based RADS warning sign in Big Cypress National Preserve, Florida, USA. When an animal is detected near the road, the lights begin to flash. Credit Molly Grace Usage Restrictions CC-BY Share Print E-Mail Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.