| 摘要 |
The present invention provides apparatus for laying on a road surface to induce a vehicle driver to reduce speed comprising a first elongated mat element for creating a relatively low bumping frequency in a vehicle when passing over said first element and a second elongated mat element for creating a relatively high bumping frequency in the vehicle when passing over said second element, said first element including a road contact surface and a series of substantially trapezium section substantially parallel transverse beam elements on an upper surface of said first element opposite said road contact surface, each trapezium section beam element having a top surface substantially parallel to said road contact surface of said first element and having side surfaces inclined outwardly from said top surface, said second element also including a road contact surface and a series of substantially rectangular section substantially parallel transverse beam elements on an upper surface of said second element opposite said road contact surface, said beam elements of said second mat element being of smaller width and being more closely spaced apart than said beam elements of said first mat element. |
