Traffic - Line Gamma 20-30mph Oval Speed Cushion L2800(mm) x W1800(mm) x H70(mm) - Red/WhiteThis Oval speed cushion is perfect for slowing traffic on slightly faster roads with a speed limit of 20 30 miles per hour. The gradient and 7cm height combined with a white border make the ramp stand out against concrete and tarmac surfaces, ensuring cars spot them and slow down accordingly. Their shape and size make them well suited and friendly for buses, ambulances, fire engines, and other vehicles that often struggle with traditional speed ramps