Abstract: A method, apparatus, media and signals for generating a computer representation of a three-dimensional swept envelope of a vehicle having a wheeled chassis operable to support a vehicle body for movement along a terrain is disclosed. The method involves receiving terrain data representing a 3D terrain, receiving data defining parameters of the vehicle, and receiving data defining a path for movement of the vehicle from an initial position on the terrain to a displaced position on the terrain. The method also involves disposing a computer representation of the vehicle on the 3D representation of the terrain at successive locations along the path using the parameters. Disposing involves determining points of engagement between wheels of the wheeled chassis and the 3D representation of the terrain to dispose the chassis with respect to the terrain, and determining a corresponding 3D location of the vehicle body with respect to the terrain.

Abstract: A method, apparatus and computer readable medium for computer generation of a geometric layout representing a central island of a traffic roundabout is disclosed. The method involves generating a vehicle path associated with travel of a vehicle through the roundabout, generating vehicle extent locations associated with travel of the vehicle along the vehicle path, using the vehicle extent locations to determine a geometric layout of the central island corresponding to the vehicle extents, and generating output data representing the geometric layout of the central island.

Abstract: A method and apparatus for displaying a representation of a traffic roundabout having a central island surrounded by a circulatory lane is disclosed. The method involves receiving an operator selection of a design vehicle that is expected to use the roundabout, and receiving operator input of a design dimension for the roundabout, the design dimension defining a size of one of the central island and an outer perimeter of the circulatory lane. The method also involves generating a circulatory path of the design vehicle traveling within the design dimension along the circulatory lane, and generating vehicle extent locations associated with passage of the design vehicle along the circulatory path. The method also involves using the vehicle extent locations to compute a circulatory lane width, and generating display signals for causing the display to display an image representing the roundabout.

Abstract: A method, apparatus, media and signals for generating a computer representation of a three-dimensional swept envelope of a vehicle having a wheeled chassis operable to support a vehicle body for movement along a terrain is disclosed. The method involves receiving terrain data representing a 3D terrain, receiving data defining parameters of the vehicle, and receiving data defining a path for movement of the vehicle from an initial position on the terrain to a displaced position on the terrain. The method also involves disposing a computer representation of the vehicle on the 3D representation of the terrain at successive locations along the path using the parameters. Disposing involves determining points of engagement between wheels of the wheeled chassis and the 3D representation of the terrain to dispose the chassis with respect to the terrain, and determining a corresponding 3D location of the vehicle body with respect to the terrain.

Abstract: A method and apparatus for displaying a representation of a traffic intersection on a display of a computer is disclosed. The method involves receiving operator input defining a relative orientation between a first roadway and a second roadway, the first and second roadways forming an intersection area therebetween. The method also involves receiving an operator selection of a design vehicle that is expected to use the traffic intersection, the design vehicle being defined by a plurality of design vehicle parameters. The method further involves generating at least one turning path of the design vehicle through the intersection between the first roadway and the second roadway, and generating first vehicle extent locations associated with passage of the design vehicle along the at least one turning path.