| 摘要 |
A road safety barrier (10) which automatically retracts to obtain central connection gaps between road and/or motorway lanes, comprising: a framework (11), erected in working position that can be retracted to a rest position, consisting of reciprocally hinged elements (12, 13, 16); a chamber (25), cut out from below a road surface, to house the said framework (11) in the rest position; means of support and a temporary blocking of the framework (11) in the erect or working position; means for the movement of the said framework (11) from the working position to the rest position and vice versa; a source of motion kinematically connected to said means of movement and equipped with appropriate means of control of said source of motion. |
