Method and apparatus for evaluating sight distance

A computing system for sight distance analysis comprising a computer and a monitor in communication therewith, said computer being operative to:

• acquire a scene-graph representation comprising three dimensional entities;
• acquire at least one three dimensional object representation within said scene graph environment;
• acquire a target object representation;
• select at least one camera position;
• position said acquired target object representation in said scene graph representation at a distance from said selected at least one camera position;
• and
• determine a visibility factor for said positioned target object representation.

A method of sight distance analysis comprising:

• acquiring an infrastructure as a scene-graph comprising three dimensional entities;
• acquiring a nominal location for a moving observer in relation to a path on said infrastructure;
• acquiring a distance to a target, said target being maintained at said distance from said moving observer;
• calculating for a plurality of points along said path on said infrastructure a straight line between said moving observer and said target;
• defining a 2 dimensional polyline representation of a visual intrusion zone;
• and
• projecting said visual intrusion zone on a representation of said scene-graph.