The city came through a neighborhood that I have a rental on and elevated the road about 10 inches and installed new city sidewalks also 10 inches higher and poured a cheap asphalt ramp to the older cracked but functional driveway. In my mind I want to rip out the asphalt ramp, place some forms, and back fill the old driveway with a bit of pea gravel and have a new driveway installed over the old one. Do I really need to rip out the driveway before I proceed? Or will a my idea work? Is there some kind of miracle material that will allow for concrete to adhere to concrete so that it won't shift or get water/ice build up between the driveways in the winter? What do you know?