Originally posted by: SWAT-MEDIC asphault highway texture here retaining wall here NAM HERE for PC (keep in mind, you only need to download for the system you have.) NAM here for MAC hole digging tools ^you will need all of that, when you get all of that, just use the hole digging tool, for ground highway, found in your misc. transportation folder(in the game), and create a line. drag your highway over the lots and delete the highway+lots, redrag highway where you would like it, and you have your self a sunken highway. to put walls on there, simply drag and plop. you may need to use the home+end keys to switch around wich way the arrow is on the walls. Your walls will be in your parks folder (in the game) the walls i have given you dont have diagonal walls, nore does the digging tool create diagonal. to do that, just create a hole of a good size, and use the flatten tool to create a diagonal sunken highway. post here for more questions: quote> Thanks a bunch! =) That really helped.