Straddling speed cushions probably causes more damage to car tyres than potholes do. And it's hidden abrasion of the inner shoulders of the tyres that sometimes does not become apparent until a blowout. So cars parked forcing drivers to drive over speed cushions one wheel over, one wheel on the flat is actually better for the car (and the people in the car) than straddling them. And, of course, cars parked either side of a street actually slows traffic more effectively than the speed cushions do. So speed cushions should be removed and, now that parking on footways is to be banned, more gauntlet-like street parking should be allowed.