| 摘要 |
The present invention relates to a horizontal rotation type safety sign board and, more specifically, relates to a horizontal rotation type safety sign board which enables a vehicle accident to be easily identified at a distance as a safety sign balloon tube is moved from side to side depending the position of a tunnel floor fixing wave for controlling the position of a plurality of rollers installed in the safety sign balloon tube, and is automatically unfolded when a collision or a crash occurs to prevent a secondary accident. |
