Older adults may put themselves at risk by talking on cell phones while crossing the street, researchers report in a new study. The researchers found that adults aged 59 to 81 took significantly longer than college students to cross a simulated street while talking on a mobile phone, and their heightened cautiousness in initiating crossing did nothing to improve their safety. Older adults on cell phones also were more likely to fail to cross in the time allotted for the task.