Having the insight of protecting sanitation workers from speeding vehicles, our idea is to disguise sanitation workers as speed radars so that they could “tip off” radar detectors to force speeding drivers to slow down. We created the Life Guard badge, when sanitation workers are wearing them, they can be detected by drivers from a safe distance and avoid speeding accidents.

The Life Guard badge transmits on K band, 24.150 GHZ, which is the same wave band as speed radar does, therefore can reach most radar detectors. It also features a 60-degree waveguide to boost the signal to an extensive 50-meter coverage, therefore gives drivers enough time and distance buffer to slow down. When a sanitation worker is equipped with the Life Guard badge, he or she has been perfectly disguised as speed radar. Passing drivers will receive voice alert from their radar detector and then slow down as they usually do, what they might not be aware of is, that by slowing down they have actually saved lives.

We’ve created this simple and easy-to-use wearable device to effectively improve the workplace safety for sanitation workers and help reduce car accidents. In the near future, we hope to use this device to help other vulnerable pedestrians such as children, the elderly, and people who are physically impaired.

Having the insight of saving lives from traffic accidents, our creative team applied existing technologies to a brand new solution. Employing radar transmission technology, the "Death Stopper" offers an innovative solution to protect millions of sanitation workers, turning road killers into life savers.

In China, out of every five traffic accidents, there’s one of which the victim is a sanitation worker. Every day these understated street heroes work on highways and at dangerous intersections. We discovered that speeding is the major cause of car accidents. Drivers use radar detectors to scan the electromagnetic spectrum in order to detect and cheat speed radars used by the police, so the idea is to utilize the existing radar detectors and turn them into something even more valuable.

Our challenge is to come up with a cost-effective solution that works within the scope of our current traffic system.