Abstract: A barrier arm operator includes a bracket operably coupled to a drive, wherein the drive rotates the bracket about an axis in a first direction and a second direction opposite the first direction; and an arm coupled to the bracket and driven between a lowered position and a raised position by rotation of the bracket about the axis, wherein the arm is rotatably coupled to the bracket about a pivot axis orthogonally oriented with respect to the axis, wherein the bracket comprises a detent configured to retain the arm in a first position relative to the bracket in an in-use state, and wherein the arm rotates about the pivot axis from the first position to a second position in response to impact of an object against the arm.

Abstract: A pair of elongated generally parallel mounting members are provided and a plurality of laterally spaced elongated transverse guide members extend between the support members. The opposite ends of the transverse guide members and the support members include coacting clamp and guide structure supporting the guide member ends from the support members for adjustable shifting therealong. The coacting clamp and guide structure is operative to releasably anchor the guide member ends in adjusted shifted positions along the support members and each of the guide members includes an anchor post supported therefrom, shiftable longitudinally therealong and releasably anchorable in adjusted position, the posts being disposed generally normal to a plane paralleling the mounting members and guide members.