Abstract: Disclosed is a vehicle barrier, such as a bollard assembly, including a main body surrounding a post, wherein the main body is operable to be positioned below grade, and wherein the post is operable to extend above grade. The main body may include an upper plate including an opening to receive the post, a lower plate opposite the upper plate, and a plurality of support members extending between the upper plate and the lower plate, wherein two or more support members of the plurality of support members extend radially from a central axis extending through the post. The bollard assembly may further include a support assembly coupleable with the main body, wherein the support assembly includes at least one support bar insertable between the upper plate and the lower plate.