Walking can be hazardous to your health! That is, if you're using your smartphone while walking. You run the risk of walking right into traffic, a light pole or off a bridge. But now -  there's an "App for that!"

WalkSafe was created by researchers at Dartmouth College and the University of Bologna. The app uses a smartphone's back-camera to keep an eye on traffic and calculates whether there is danger using a combination of machine-learning and image-recognition algorithms. (According to Technology Review, this means that the WalkSafe is able to detect when a car is aproaching at 30 miles per hour — or faster.)

Once the app has detected potential danger, it will issue a warning in the form of sound and vibrations. In theory, that buzzing and chirping should be enough to startle you into paying attention to the car that's about to run you over.