Traffic information

Launched on Thursday, the Waze iPhone application is designed to give users real-time road information. Based on input from other users' iPhones, the app can provide traffic speeds, reports on accidents or other notable road conditions, and much more. In addition, the app can give drivers turn-by-turn directions and send out tweets based on reports they make while driving.

Here, the Waze app is showing a live map while driving through San Francisco. The red rectangles denote traffic speeds as reported by other users.