All of the tax we pay on fuel just disappears into The Treasury's coffers to be wasted spent on all sort of things ranging from repairing people that have caused themselves ill health to invading far flung countries. Our roads don't have the extremes of temperature to deal with that yours do, but they do have to deal with extreme traffic. Trucks here are 44 tonnes and the roads are packed with them and get a beating from the relentless traffic. Since the financial system fell to pieces in 2008 the government has been spending even less on roads and they are getting in a bit of a state.