| 摘要 |
A barrier includes a housing having an interior surface bounding a chamber that is adapted to receive a ballast, the housing having a central body extending between a first end and an opposing second end. The barrier includes a first projection projecting outward from the first end of the central body and a second projection projecting outward from the second end of the central body. The first projection and the second projection are configured so that for identical housings the first projection of one housing can overlap the second projection of the other housing while the floor of both housings are resting on a common support surface and one housings can be selectively positioned relative to the other over an angle in a range between at least +45° and -45°.
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