The incidence of run-off road crashes involving roadside objects, the types of objects involved and the types of injuries caused are analysed. It is shown that a large proportion of injuries are caused by roadside objects and suggestions are made for improved roadside designs in line with TD 19/06 'Requirements for Road Restraint Systems'. The argument is then put forward for passive alternatives to traditional street furniture which will not kill or seriously injure vehicle occupants. Three levels of Energy Absorption Categories with varying modes of action - Category NE, Category LE and Category HE - are then described. In justifying the use of passive systems a difficulty is identified in identifying sites for treatment as accidents do not tend to occur in clusters. The suggestion is made that the outsides of bends and curves could be examined. The cost implications compared with traditional structures are considered. Injury risk is discussed and it is concluded that while it is accepted that the risk of primary injuries is reduced there is no greater incidence of secondary injuries. Issues associated with the electrical installation of both passive and traditional columns are noted.
Samenvatting