And you cannot be charged by going less than 10km/h above the limit, because you can't be expected to monitor your speed at all times. And extra 10km/h to acco

And you cannot be charged by going less than 10km/h above the limit, because you can't be expected to monitor your speed at all times. And extra 10km/h to account for instrument / measurement errors. Giving it an enforcable maximum of 160km/h = 100 mph. Yay :D