Asphalt Concrete Basis is a combination of aggregate, sand, and asphalt cement that is used as a base beneath additional asphalt pavement courses, most typically in a highway application. If the asphalt base is not put by hand, the equipment needed is an asphalt paving machine or road widener, as well as 2-3 tandem rollers. The asphalt base should be smooth with no large rocks or dirt that could damage the underside of your vehicle. The first step in preparing the site for paving is to remove all vegetation within 10 feet of the proposed job site and any structures other than those necessary to support the weight of the truck. Then, if you'd like, you can spread a thin layer of sand or stone over which to place the base material. This helps the asphalt flow evenly during placement into the desired pattern. Next, use the road grader or string line to scribe the edge of the work area where the asphalt will be placed. Start at one end of the scribed line and move it across the ground in a straight line until you reach the opposite end. Make sure that you leave at least 3 inches of space between each line of scotch tape to allow room for even spreading of the asphalt later on. After the base material has been laid down, using the same type of equipment you employed earlier, spread another thin layer of sand or stone over the top. This helps the asphalt layering process go more smoothly.