| 摘要 |
A vehicle display sign mounted laterally across the roof of a vehicle. The sign has two visible display surfaces (13) when the vehicle is stationary and a third surface (12) visible to following traffic when the vehicle is in motion. The display sign is of a selected aerodynamic shape which enables the air flow resulting from the vehicle movement to angularly displace the sign to expose the third surface. The two display surfaces which are visible when the vehicle is stationary may either be made of rigid material and pivoted about a rod (10) to enable angular displacement, or, may be made of a flexible material without the need for such pivoting. |
