Those are cloned adboards and shops? If yes, i really hope you didnt save them under the original name, you will see this ones in all maps.
If you have visible overlaping terrain (grass over asphalt) either use a brush named INVIS who makes parts of the terrain invisible, either use VORTEX (V) to glue the terrain nodes one to another, it will look nice. Off course for vertex is better to have terrain parts smaller with a hole between them and then use the nodes to make a nice merge.
Other than that it looks great
![:thank_you:](./images/smilies/thank_you.gif)