Any road pricing scheme that uses a rebate if you have a passenger is much more viable in France. They already do quite a bit of car sharing ("covoiturage") because they tend to have standard and fairly rigid working hours.

An interesting take on road pricing to give a rebate for not using - the norm is to charge for using.

However, who is eligible for the rebate - just those with a passenger? It may even encourage those who usually car share to make a small diversion - mway tolls permitting.

Or locals near to the toll booths doing a roaring trade in short trips as passengers in return for a cut...or 'ladies of the night' changing their pick-up points to score more cash via a discount for punters? The prospective rubber dinghy lot might go in for some extra pocket money before they departe for LeRosbifland?

I wonder if dogs and cats also qualify as 'passengers'?