We are in France now and despite RS guidance in books and previous postings, our US Chip and Signature card worked without a hitch for tolls and getting gas at self service stations. In fact, from what we experienced driving from Perpignan to Avignon, there were no "people" manned toll booths. Only "T" (passes) or credit cards and no cash lanes. Confused us a bit at the first toll to pay, but used our Chip and signature card, and the gate opened.
For those driving on the Tollways, when you enter, look for the lanes with the Green arrow and "t" to pick up your ticket. It you chose a "t" lane only, that's for passes, and I don't think you'll get a ticket, When you exit or have to pay a toll, all lanes say "t" but look for the lanes with the credit card picture or "t" AND green arrow, NOT "t" ONLY (pass only lanes). insert your ticket, then your card, and then the gate will open.
We also used our Chip card at a self service gas station with no issues. After inserting the card, the screen says that card was authorized for 131 euros. We only put in 31 euros, but all went smoothly.
Compared to Italy, driving in France (Provence) is a breeze.