I agree French drivers are much more disciplined about use of motorway lanes than us and return to the inside lanes after overtaking, this means even the 2-lane motorways flow more freely than ours making for much more enjoyable journeys than in the UK. Due to the tolls actually being spent on the roads (no road tax in France!) most motorways also have few roadworks and very good surfaces unlike our potholed roads.
Sanef, the French motorway operator has now extended its Liber-t automatic toll payment service to UK motorists which saved me stopping at the toll booths last time I was in France. 
"To use the service all you need to do is register online and we will send you a small electronic transponder (or tag) that you attach to your windscreen just behind the rear-view mirror. As you approach the barriers, a device by the barrier will read your transponder (or tag), securely extract your unique reference and then automatically open the barrier without you having to stop. You will receive an invoice the following month for your tolls and then around 15 days later we will automatically collect the payment in £ (GBP) from your bank account by direct debit from your UK bank account.
Once you have subscribed you will be sent a small Tag / Transponder and you must attach it to your windscreen."
https://www.saneftol...ow-does-it-work
If you are going by Eurotunnel you can also get a special offer on this:
https://www.saneftol...er-Landing-Page
.....and oh so quiet.
