| 摘要 |
A portable roadway warning device comprises one or more rumble strips. Each rumble strip comprises at least two modular strip sections, each made of a polymeric material having top and bottom surfaces and end edges and side edges. At least one of the end edges of each of the strip sections has a plurality of aligned alternating notches and tabs, and connecting links hingedly connect the tabs at one of the end edges of one of the strip sections to respective aligned tabs at one of the end edges of another of the strip sections. |
