This study is for the safety display device to the transportation of the road that are installed on the boundary stone. This device includes an upper side that is located and fixed on the boundary stone top, and a side that is fixed on the boundary stone front. Solar cell convert light of solar to electric energy is equipped inside the upper side. the device’s side part is consisted 3 part. the charging unit for charging the electric energy generated from the solar cell to charge the battery, the illuminance sensing unit for detecting the night, and the LED unit for flashing traffic sign in night. furthermore this device can be installed easily on the boundary stone. and it can help driver to aware road and boundary stone by improving visibility in night time.