Abstract: A gate barrier includes two parallel posts, a folding collapsible barrier pivoted to one post and turned by a power drive to close/open the passage way between the posts, wherein the folding collapsible barrier has a barbed bottom rail which is supported on the ground to prevent vehicles from passing when the folding collapsible barrier is turned to a horizontal position to close the passage way.

Abstract: A gate barrier which includes a first post, a drive shaft and a driven shaft revolvably supported on the first post at different elevations, a second post disposed in parallel to the first post, the second post having at least one angled holder plate, and a folding collapsible barrier having a fixed end fixedly connected to the drive shaft and the driven shaft and a free end for resting on the at least one holder plate at the second post, the folding collapsible barrier being extended out when lowered with its free end rested on the at least one angled holder plate at the second post, the folding collapsible barrier being collapsed when lifted from the second post to a vertical position in vertical alignment with the first post.