Create freeway bricks next or something. Don't stop at just making roads, make the whoooole set. Pretty please, I really like these roads, and I'd like to see you make the rest of the road-types as well. :3
Seriously though, holy forget, these are awesome. It'd save people a lot of effort when building City RPGs and there would be far less lag due to the use of less bricks to make a decent looking road.