Those cars don't have fiscal or environmental preferences. Instead, they can sneak under the barrier.

At Motor1.com, we have been looking for a list of some of the lowest cars in the world for quite some time. However, a traditional approach to this subject seemed a bit boring, so we decided to do it our way.

After a meeting with Claudio Roddaro, a resident of Monaco, who drives a Porsche 917K registered as a road car, a couple of questions popped out in our heads. What happens when you need to pay a toll tax? What about public parking lots? Is it criminal to sneak under the barrier? Who knows...

That last option sounds like a nice idea, considering the toll prices of the roads at the French Riviera. If we assume sneaking under the barrier is not a crime, here are 15 vehicles that can get you a free parking or a free motorway access.

More rare supercars: