Some sources on the Internet warn that French motorway toll machines might expect chip-and-PIN VISA cards as payment, and reject US chip-and-signature VISA cards. However, other, more recent sources claim that this might have been the case before July 2015. And, supposedly, after that date new VISA rules required all terminals in Europe to accept chip-and-signature VISA cards as well.
So, can anyone please confirm the current state of affairs with regard to that matter? Do unattended motorway toll machines in France normally accept US chip-and-signature VISA cards? What about merchants in general?