My father and I have been thinking about starting a kickstarter for our ideas, and this is just one of those. We're busy making the prototype now, and if everything goes smoothly we should have something assembled physically to show off next weekend.
Basically, the idea is to have four pieces (and their mirrors) which you can make bridges of different sizes with. The road part can be just about anything flat, so it can be as wide or skinny as you want.
So, what do you think?