Abstract: A post device, which is yieldable when hit by a vehicle, comprises a post with a base having at least three spaced-apart fixtures fixedly attached thereto, and a foundation with a fixing device supporting at least three spaced-apart rods, which are arranged to cooperate with the fixtures, thereby securing the post to the foundation. The fixtures are arranged on the outside of the base and embrace the associated rods and are each provided with a through opening or slot which is oriented substantially in the longitudinal direction of the post. Stop devices each engage an associated rod and an upper portion of an associated fixture.