Speed ramps are installed in places where driving speed has to be limited. It can be also used as risen zebra crossing. In that case such a crossing is very good visible by the drivers.
That crossing is much more safe for the pedestrians than the normal one. All drivers have to slow down to pass it. Their construction let them to be installed and uninstalled on the road many times (installation by screw). Crown cups protect screws against mud and water. The underside of the product lets the element to be fit very precisely to the road. Sides of element are specially shaped what let them to be put very precisely to each other. Thanks to application of chemical-harden paints speed ramps keep its colours for very long time even though road hard conditions. Reflective elements in the form of special yellow strips make ramp visible during night.