Uber plans tighter screening for drivers

(Reuters) - Online taxi service Uber Technologies Inc, one of whose driver was accused of rape in New Delhi, said it would add new methods to verify drivers' credentials and make its service safer. Uber has started research and development on biometrics and voice verification to build tools for enhanced driver screening, Phillip Cardenas, the company's global safety head wrote in a blog. (http://bit.ly/1whWUbV) The start-up was also exploring new ways to screen drivers, including polyg