Motorway side wall planks has a double plank at intervals in the center reservation which can be lowered by a drive to give more rapid access by police and rescue services

摘要

The guide boards, at the sides of motorways, has a double plank (5) at the center reservation with a lowering mechanism (1) at intervals. The concrete segment (2) is a compact unit with vertical guides (3) for the planks (5) with their supports (4). Drives (7) are at the concrete segment (2) with transmissions (6) to the plank supports (4).