The more common road hazard has been the grates (cast or using rebar) that can swallow a bike tire. Railroad track crossing are another hazard and often there is not enough room for bicyclist to cross safely at a 90 degree angle.
A universal problem is highway personnel filling potholes with dry patch and tamping it down. It lasts a week or two and then the hole is back again. I contacted my local official and he has placed a special hot patch machine in the county budget for the next fiscal year. He is doing it for the motorists but bicyclists will benefit as well.