Patent ID: 8465047

Claim:
A system, comprising: (a) first and second platforms comprising at least one set of wheels; and (b) a safety wall positionable between the first and second platforms to define an area protected from a vehicular incursion, the safety wall comprises first and second segments, the segments having first and second sets of holes, respectively, oriented transversely to an exteriorly facing surface of the safety wall, the holes, when aligned, receive dowels to lock the first and second segments in position relative to one another, wherein at least one of the following is true: (B1) the safety wall rotates, by first and second arms, to either side of the first and second platforms, wherein the safety wall has a height of at least about 4 feet from bottom edge to top edge; (B2) the safety wall has a height that is substantially the same as a width of at least one of the first and second platforms, wherein the width ranges from about 6 to about 12 feet; (B3) a weight of the safety wall is at least partially offset by a ballast that is movable, along a fixed path, from one side of the first and/or second platform to the other side; (B4) the safety wall rotates upwardly from a substantially horizontal position to a substantially vertical position; (B5) the safety wall rotates downwardly from a substantially horizontal position to a substantially vertical position, wherein an axis of rotation of the safety wall is horizontally offset from a longitudinal axis of the first and second platforms; (B6) the safety wall rotates counter-clockwise from a substantially horizontal position to a substantially vertical position; (B7) the safety wall moves from a first side of the first and second platforms to an opposing second side, wherein a first surface of the safety wall faces outwardly when the safety wall is positioned on the first side and a different second surface of the safety wall faces outwardly when the safety wall is positioned on the second side; (B8) one of the segments being rotatable with respect to another of the segments; (B10) the safety wall moves vertically from a first undeployed position to a second deployed position, the vertical movement being directed by a guide mechanism engaging the safety wall and an adjacent one of the first and second platform; (B11) an inclination of the safety wall, relative to vertical, is adjusted about a substantially stationary point on the safety wall; (B12) the safety wall is displaced linearly from a first side of the first and second platforms to a second side of the first and second platforms; (B13) the segments being slidably, but not telescopically, engaged with one another; (B14) the safety wall slidably engages at least one of the first and second platforms; and (B16) at least one of the first and second platforms and the safety wall comprise a guide mechanism that directs the safety wall into a desired position.