Water level Warning Sign / Road Sign

With the outbreak of urban water logging,many roads will be flooded,and sometimes the water even exceed the safety level which allows the vehicle to pass.Sometimes due to the misjudgement of the road conditions, even the experienced drivers may get their vehicles stalled when passing through large pools or puddles of water. As a consequence,road is going to be blockaded and traffic is disrupted.This device aims to add a new function,water level warning,to the road sign which is located at the crossroad.And with their information of puddles in each direction,drivers are able to change routes promptly.