I found this article on CNN.com today, and although it is highly abridged, some of these tips may be helpful to travelers considering driving in Europe.
Story highlights (copied directly from the article) include:
-On weekdays from 7 a.m. to 6 p.m., there's a fee to enter London's congestion zone
-In France, children under 10 are prohibited from riding up front
-On Italian roads too narrow for two vehicles, the larger one has the right-of-way
-In Spain, if you wear glasses you must have an extra pair in the car
Again, not much information that you may not already know, but someone out there might find it helpful... Happy travels!