Method and system for representing traffic signals in a road network database

A method for representing traffic signals in a road database of a navigation system on a computer-readable medium, wherein the road database is used for purposes of representation of traffic signals at intersections located in a geographic area, the method comprising:

• storing data that identifies a plurality of traffic signals and an associated location;
• associating a plurality of maneuvers with one of the plurality of traffic signals, wherein the plurality of maneuvers describe multiple geometric paths within an intersection from an incoming lane to a plurality of outgoing lanes, wherein the plurality of maneuvers provide routing data for the navigation system,
• wherein at least one of the plurality of maneuvers is associated with a confidence value indicative of a probability that a vehicle traveling from the incoming lane into the intersection to one of the plurality of outgoing lanes follows a specified path through the intersection;
• and
• for each physical traffic signal that has more than one face, storing data that identifies a traffic signal and associated location for each separate face,
• wherein the data that identify each traffic signal and associated location for each separate face for each traffic signal that has more than one face represents traffic signals in the road database.

An apparatus comprising:

• a database configured to store a maneuver list, wherein the maneuver list includes traversals of intersections from a plurality of incoming lanes to a plurality of outgoing lines, wherein for each represented intersection, the maneuver list identifies a geometry for each maneuver of one of the plurality of incoming lanes into the intersection and one of the plurality of outgoing lanes out of the intersection so that separate maneuvers are identified for each one of the plurality of outgoing lanes;
• and
• a controller executing a driver assistance application configured to access the database and the maneuver list to select one of the plurality of outgoing lanes according to a route,
• wherein the maneuver list is associated with a confidence value indicative of a probability that a vehicle traveling from one of the plurality of incoming lanes into the intersection to one of the plurality of outgoing lanes out of the intersection follows a specified path through the intersection.

A method for representing traffic signals at intersections, wherein the traffic signals display multiple phases including at least a stop phase and a go phase, and wherein the traffic signals operate with different timing sequences, wherein the method comprises:

• storing data on a computer-readable medium that represent multiple traffic signal clusters for each of the intersections, wherein a first traffic signal cluster identifies each traffic signal at an intersection that displays multiple phases according a first timing sequence of operation;
• storing maneuver data, wherein the maneuver data identifies permissible traversals of represented intersections, wherein the maneuver data for each represented intersection identifies a lane into the intersection and a plurality of lanes out of the intersection so that separate maneuvers are identified for each one of all lanes from which the represented intersection can be exited, wherein at least one maneuver is associated with a confidence value indicative of a probability that a vehicle traveling from the lane into the intersection to one of the plurality of lanes out of the intersection follows a specified path through the intersection;
• storing data that associates each maneuver with one and only one traffic signal cluster;
• and
• for each traffic signal located at the intersection that has a timing sequence that is not in parallel to the first timing sequence, storing data that represents a second traffic signal cluster for that intersection,
• wherein the second traffic signal cluster identifies
• each traffic signal at the intersection that displays multiple phases according a second timing sequence of operation, wherein the second timing sequence of operation is different from the first timing sequence of operation,
• wherein the data that represent traffic signal clusters are used to represent the traffic signals with a road database,
• wherein the road database is used for purposes of representation of the traffic signals at intersections located in a geographic area.