Radar sensor for cyclists keeps tabs on dangerous traffic from behind

Cyclists are always advised to keep a clear distance from motorized traffic whenever they can to reduce the chances of collision, but it’s difficult to know when cars from behind are in danger of coming too close. While Japan’s Safety Sight app already warns drivers if they’re heading too quickly towards another vehicle, a new device called Backtracker now aims to save cyclists’ lives by letting them know of dangerous traffic coming from behind.