Rule based three-dimensional (3D) intersection model

A non-transitory computer readable storage medium encoded with computer program instructions which when accessed by a computer cause the computer to load the program instructions to a memory therein creating a special purpose data structure causing the computer to operate as a specially programmed computer, executing a method of designing a road intersection in a three-dimensional (3D) modeling and visualization system, comprising:

• defining, in the specially programmed computer within the 3D modeling and visualization system, a first road;
• defining, in the specially programmed computer within the 3D modeling and visualization system, a second road, wherein the second road intersects with the first road;
• acquiring, in the specially programmed computer, a set of one or more design rules that define characteristics of use that contribute to a shape of the road intersection, wherein the one or more design rules are based on a type of vehicle, an angle of the road intersection, and a type of roadway;
• directly creating, in the specially programmed computer, based on the set of one or more design rules, a 3D model of the road intersection, wherein the 3D model of the road intersection is a true 3D model, and wherein the road intersection further comprises a currently active intersection style;
• displaying, in the specially programmed computer, the currently active intersection style;
• modifying, in the specially programmed computer via user input, a property of the first road or the second road;
• and
• automatically, without additional user input, updating, in and via the specially programmed computer, the 3D model and display of the road intersection consistent with the modified property and the set of one or more design rules.