Abstract: A system and method for the automated design of accessible ramps is disclosed. A ramp data structure is provided having general shape information for a plurality of ramp types. A ramp environment data structure is also provided with 3D reference information for one or more ramp installation environments. After user selection of a ramp type and installation environment a 3D ramp design is automatically generated conforming to the selected ramp environment. Also, the ramp design may be automatically compared to a design standard to determine if the design is in compliance. Also, convenient editing may be employed while conforming to the ramp environment with real time updates to the 3D ramp design.

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 generating a representation of a vehicle path for display via a computer is disclosed, which involves receiving start location information including a start location and an initial orientation of the vehicle and end location information including a desired end location of the vehicle, and receiving a selection of a vehicle defined by parameters that define a turning behavior of the vehicle. The method involves receiving constraint information identifying at least one constraint to passage of the vehicle between the start and end locations and causing a processor circuit to generate a vehicle path for travel between the start and end locations, the vehicle path based on the turning behavior of the vehicle and being generated such that the vehicle path remains within the at least one constraint.

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 generating a geometric layout of a traffic intersection is disclosed. The method involves receiving intersection capacity data, where receiving includes receiving an identification of a number of intersection legs associated with the traffic intersection, receiving a lane designation designating a plurality of lanes for accommodating permitted vehicle movements between the intersection legs, each lane having at least one associated permitted vehicle movement, and receiving lane width dimensions for accommodating an expected vehicular traffic volume associated with permitted vehicle movements on each of the plurality of lanes. The method also involves generating a geometric layout of the traffic intersection by receiving orientation data defining respective orientations of each of the intersection legs.