Looking for words of wisdom regarding French toll booths. We just got back from a wonderful trip, newly armed with a chip and pin card (from Andrews FCU). It worked almost everywhere in France, including unmanned toll booths except: unmanned toll booths on the A10 in the Loire Valley. There were no manned booths, nor were there any signs for which lane accepted cash. In the first instance, we headed for the credit card lane on the right. When we pulled up, there was a small sign on the machine showing VISA and Mastercard "X"ed out. Quite fun as cars piled up behind us. After we got out of that one, we carefully approached the next booth with our hazard lights on, so no one would pull in behind us. Again no signs. This time we were told to back out and go to the lane with the "T" on the far left. Sure enough, that one had an unmarked machine that would take cash.
Anyone have any experience with this? For now, we'll be putting on our hazard lights. It would be great if there is a trick to knowing which toll booth to head for in these circumstances, or which highways are problematic. Luckily, I speak enough French to get us through this, but I sure hated holding everyone up behind us! Thanks for any advice you can offer.