Waze warns you about dangerous intersections in big US cities
 

Most navigation apps can get you from A to B while avoiding traffic snarls, but they rarely give you a feel for how risky the drive might be. Is that intersection a cake walk, or a death trap? Waze thinks it can help. It's now alerting drivers in fiv...

http://www.engadget.com/2016/03/23/w...intersections/