Originally Posted by a4anurag
And if the speed is not decreased to go over the small Black & Yellow ones there will decent damage to the tyres / suspension and will induce rattles.
So it does work for what it has been designed.
Agreed. And it has come from experience. I have to admit I initially thought that these are some kind of joke after having negotiated those iceberg like speed breakers all these years. And the first time I crossed one of these on even third gear made me realize that these can be equally nasty to your car and you really need to slow down.