Good puzzle game, makes one think.
It would be great if we could see the road directions. Which would also eliminate the need to have 2 ramp objects (I assume we switch between ramp up->bridge->ramp down), and instead, "imply" that the road is going up/down. You can also have the same effect by using the mouse wheel to adjust the road level...
Cheers!
Also, kudos on having a level editor, especially in a jam game :)