This has been much in the news recently and was discussed on Radio 4's Any Questions. The follow up program raised 2 points that I thought interesting, so I'm passing them on for discussion/comment/ideas.
The first was an answer to country dwellers where public transport is not a viable option, and involved a fuel payment card that would charge/adjust payment depending on your postcode, so an urban address would pay more than a remote rural address.
The second was a tarrif based on the engine size and mileage between MOT tests.
Now I can see shortcomings with both of these, but I think they both contain the basis of viable ideas if road pricing is going to happen
![Sad :(](./images/smilies/icon_sad.gif)
Angus