I like how everyone says this is nice and cool and spectacular but if the OP put something in the title other than crappy we would have everyone posting more suggestions/things that could be fixed etc lol.
I don't find it crappy.However, what would be a nice addition is to change the roads so they aren't using the default bricks. The things on the sides are nice, but maybe use the bevel bricks for the middle.
I only used default bricks with this, sorry.
This statement is invalid because there is absolutely no reason to not use add-ons