Sign up for an Award
Participate with your entry in one of our professional or student awards.Sign up for an award
You are using an outdated browser. Please upgrade your browser to improve your experience.
In China, there are thousands of people get injured by or died of the disappeared manhole-covers, and three-quarter of them are children.The missing manhole-covers have become an invisible killer in the city.The Cover-The-Hole is actually a “LED tape” with a range sensor, which uses the green lights to woven into a virtual net, building mental obstacle in the passers-by`s mind.And red ones to form a red fences, warning people not to get close.Besides, if there is a flood and the manhole-cover has been washed away, the red led lights can also pass through the water and warn the surrounding people.