High on my list of places I want to visit one day in my life is Iceland, but I am worried by a warning I heard.  One of two people who talked to me about Iceland experiences told me she was rather disappointed, because in many areas where they went, they were annoyed by four-wheel-drive cars driving by, spoiling the nature experience.  The warning has stayed with me ever since.

Indeed, looking around on Google Images, Panomario, etc., one finds many photos of cars and 4WD-roads in the middle of the wilderness.  Example [one](http://matthiasbook.de/travel/island2004/img/max/20040704/pict0458.jpg), [two](http://www.panoramio.com/photo/75974821), [three](http://www.panoramio.com/photo/58540217), [four](http://www.panoramio.com/photo/83668472).  I would not like to be disturbed by a noisy 4-WD that can likely be heard kilometres away, while three days into a backpacking trip.

Are there any larger areas of Iceland where offroad/4WD-driving is **not** permitted?  Apart from the obviously inaccessible areas such as Vatnajökull, that is.  A map with explicitly prohibited areas would be a great aid in planning a backpacking trip that includes a tranquil nature experience and solitude.