As I have said many times in many places. Get rid of all speed bumps on main routes where buses and lorries are supposed to go and where the through traffic should be. Also change these back to 30MPH, get the traffic flowing. Then the side streets/non main roads should be for cyclists, walking scooting and access for residents cars etc with speed bumps and 15 or 20 MPH speed limit. I am fed up driving along at 20MPH being over taken by motor bikes/scooters and other cars. Unfortunately the current design used of speed bump cushions etc are rarely ones that can be navigated at the permitted speed limits without damaging your suspension or your joints. So sorry every one but many I have to slow to 10MPH or it causes great pain. (Eg Wood Vale, Southhamton Way, and most if not all of the raised flat crossings like Foresthill Rd. Before anyone chips in with comments, I cannot cycle, walk far, scoot or use public transport and have the huge cost of running a private small car otherwise I would be housebound. I am also not suggesting to ban walking etc from the main 30MPH Roads, but hell people need to learn road safety and how to cross roads etc again like this ol fart did.