Well, before roller coasters are built the person in charge has to hire some computer designers.  They also have to have some ideas and blueprints. A blueprint is an idea drawn on blue paper. It has all the plans and layout on it.  It is like the recipe and now all you need is the cook.  Next, the person in charge has to hire a company to do all the designing, building and painting.  The person in charge tells them what they want and the company does it.

This is how a roller coaster is constructed. First they bulldoze dirt away in an area. Then with the help of a crane, big steel structure pieces are lifted in to place and bolted together. This is what the track will soon be.  There are lots of people working on the site of course, and they’re doing all different jobs at the same time.  One job is a bulldozer  who pushes dirt around the footers (little pillars that stick out of the ground).  The only way to find the center of where the footer is going to be placed is by using a plumbob (a pointed dagger on yarn.)  Next, you would hold it up to measuring tape, which gives you a precise horizontal measurement even though you’re actually measuring into a hole.  

Before you start construction the ground has to be the right height according to the blueprints. Heavy machinery like bulldozers and other construction vehicles are used to level the ground for the roller coaster. After the land is the right height, use must make more measurements to ensure it is right. After that long wooden reference makers are put down in the ground different positions. The markers are put in the ground so a measuring device can be attached.  Before a coaster is built, surveyors must make models of the roller coaster and make sure that it is safe. Then they build it, piece by piece. Finally, after about one year, the coaster is built, and the cars are attached. Now, the coaster is tested with sandbags. If they fall out, and the sand blows up, they need to put in more safety adjustments. If it finishes the ride successfully, it is ridden by testers, then the owners and their families, and finally by the public! That is how coasters come to be!