| 摘要 |
PURPOSE: A concave over-speed preventer having a drain function is provided to guide drainage of rainwater as well as preventing over-speed driving of vehicles and to prevent noise caused by vehicles passing over the over-speed preventer. CONSTITUTION: A concave over-speed preventer having a drain function comprises a drain part, a concave over-speed prevention part(20), and fixing ribs(30). The drain part is opened upward to collect road-surface water and guide drainage. The concave over-speed prevention part is symmetrically formed both the front and rear sides of the drain part, lower than the road surface, in order to prevent over-speed driving of vehicles. The fixing ribs are integrally formed in the drain part and the concave over-speed prevention part.
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