| 摘要 |
The warning is for drivers of vehicles entering motorways in the wrong direction in exit lanes. The unit extends across the whole carriageway width. This is accommodated in a profile rail-shaped bar let into the road. Its movable part is lowered into the road when traffic rolls over it. It can have a lighting unit and dirt-wipint unit accessible from the side, and replaceable if necessary without interrupting traffic. This is effective and conspicuous by day and night. |
