i think it is for UK drivers to tell 30 mph is the max speed in residential areas and 70mph is the speed on motorways
did u notice why there is an icon on the petrol gauge, the icon is either o nthe left or right hand side of the gauge to indicate what side the fuel cap is on to fill your car up [for woman drivers no doubt š], though i have made the same mistake several times when driving a new car showo..