| 摘要 |
The present invention is directed to differing embodiments of safety trailers, which have first and second platforms and a safety wall positioned therebetween. The platforms and safety wall define an area protected from vehicular incursions. In a first mode, an asphalt roller engages a road surface while a set of rubber wheels do not, and, in a second mode, the set of rubber wheels engages the road surface while the asphalt roller does not. |
