In a Nov 29 USA Today travel article, 'Stealth traffic tickets spoil European vacations', the author Christopher Elliott states "car rental companies need to ... equip every vehicle with the necessary permits, so guests aren't broadsided with $800 bills after their European vacations." Do you know what is meant here about permits as it relates to travelers? I thought permits of this type would only be available to citizens. Does anyone have experience with purchasing such a permit? It might be useful if you're staying for a period of time in an area. Do any regions or countries have permits that are broader in scope than a single city?
Here is the reference to the article:
http://www.usatoday.com/story/travel/advice/2015/11/29/europe-traffic-ticket/76443482/
Thanks to guidebooks and this forum we won't be driving into cities on our next trip to Italy, but just curious about the above.