Originally Posted by Happy

The real problems are, the unmanned gas stations and toll booths would only accept the Smart Chip Cards. If you are caught with low gas on a Weekend in Switzerland or France, you are completely out of luck when all the manned gas stations closed. Or if you took a wrong exit on a toll road, and then realized the toll booth for you to return back to the freeway is not manned and only accept Smart Chip Card... Or you are at a train station, the only way to get train tickets is thru the machines which of course only take Smart Chip Cards...

US travellers to Europe need to be aware of such scenario and not to be caught off-guard.