I have to negotiate about 10 every morning on the way out of the estate where I live To be fair some of them aren't to bad & you can get your wheels over the sides. The worst has been since last Friday when they re-dressed some of the roads on the estate. Re-dressed consisted of some tar then tons of gravel which they left until Monday At times, even at 15/20 mph, you can hear the stones underneath the car, worse than any speed bumps