[QUOTE="Champ"] I'm not sure what you mean by "artificial" here. It's fairly obvious that road space on the main routes into London is more valuable than my example of the A9. You can tell it's valuable because people queue up to use it.[/QUOTE] But the A9 is equally "valuable" to those that need to get from Perth to Dunkeld as the M4 is to someone who needs to get from Swindon to Windsor - so making the M4 twice as expensive to drive on as the A9 is artificial or at least arbitrary. Whereas I admit my main objection to road pricing is the civil liberty aspects, I am also quite certain road pricing or even fuel pricing won't sort the problem in more than a limited or transitory way. Taxes are a very blunt instrument and have never promoted long term change. The congestion problem is systemic. We've seen this with the congestion charge in London - it doesn't reduce car use, it just moves it somewhere else and blocks that up as well.