We have the French equivalent to an E-Z pass. It's called a Liberte, and you can get it at the first toll plaza you come to. You need to park and go inside the building. Ours is linked to our American Express card because many years ago when we got it our Visa card didn't register in the system, but our Amex did. They said something about Amex being an owner, etc. It's at least five years later, so maybe a Visa card will work in their system.
We keep the Liberte with our other travel paraphernalia and take it along each summer. We don't attach it to the windshield but hold it up to the windshield at toll plazas and keep it with us when the car is parked. Everyone is advised to remove it from the windshield when parked because they aren't permanently attached and can be stolen out of a car.
It makes a huge difference getting through because sometimes the credit card and cash lines can back up pretty far. The T-lanes are numerous and always clear. The total appears on the Amex each month, but you can verify the amount on the Liberte website. There's a small charge, around 3 euro, for each month you use it. It works on all toll roads in France, no matter who owns or runs it. Another regular around here, Nigel (who seems to have disappeared for the moment) uses it the same way we do--his wife holds it up to the windshield while he buzzes them through.
