I'm really hoping we can take advantage of the start of driverless cars to implement a per kilometer and also demand driven tax/toll system. The current method

I'm really hoping we can take advantage of the start of driverless cars to implement a per kilometer and also demand driven tax/toll system. The current method of funding roads with fuel tax won't work any more, and it doesn't make sense for the taxpayer to pay for roads if they barely use a car and take public transport. I am optimistic this method of taxing cars will make public transport much more attractive, especially in peak, and encourage off peak driving. This will be especially important for empty cars - they don't care about congestion so without a tax would fill up the road for extremely unimportant tasks. This also gives the option of different rates if the vehicle is empty or not - I have no idea if an empty vehicle should be charged more or less, but it's good we have time to think through these things! I am interested how the politics of this will work out - in Sydney the government often builds toll roads when rail would be more appropriate as they can privatise roads and get additional income. This leads to the government building more freeways to the airport when we already have a fast train there (which has a huge station access fee as a result of a previously botched public/private partnership).