Advice for driving over speed cushions ('pot hills'): One wheel over the cushion, one wheel on the flat road. If you try to minimise the hump by straddling the hump’s chamfered edges you wear away
the inner shoulders of your car tyres: damage you would not normally see that could result in a high-speed blowout on the motorway. Be particularly careful of chamfered edges of speed cushions in the snow because they could cause your car to slip sideways into an adjacent parked car, in which case whoever installed the speed cushions would be directly liable. After the frosts, watch out for crumbled edges of speed cushions because these can lacerate the inner shoulders of tyres on one pass.