Route calculation method for a vehicle navigation system
First Claim
1. A method for managing traffic signals controlled by a signal control center to alleviate traffic flow problems associated with vehicles traveling on a road having a first lane and a second lane, each vehicle having a navigation device, the method comprising:
- receiving location data and speed data from a navigation device in a target vehicle traveling in the first lane;
receiving average vehicle speed of vehicles traveling in the first lane;
receiving average vehicle speed of vehicles traveling in the second lane;
determining the speed differential between the average vehicle speed of a vehicle traveling in the first lane and the average vehicle speed of a vehicle traveling in the second lane;
determining the distance that the target vehicle is located from a traffic signal; and
modifying a signal timing of the traffic signal, based at least in part on the determined distance and the determined speed differential.
0 Assignments
0 Petitions
Accused Products
Abstract
Traffic information, including flow information and incident information, obtained through a traffic management system for providing and facilitating the exchange of traffic information between a remote location and a vehicle may be used in route calculation by a navigation device. The navigation device may recalculate a route based on anticipated user error. Alternatively, the navigation device may recalculate a route using received traffic information triggered by the receipt of a traffic information update, or triggered by the passage of an amount of time. The broadcast rate of traffic information updates may vary temporally (providing more frequent updates during peak commute times) or geographically (providing more frequent updates to metropolitan areas with increased traffic information needs). If route calculation is triggered by an elapsed amount of time, the amount of time may vary to be shorter during peak commute times. Additional route calculation techniques allow the incorporation of historical traffic information or the use of the most recent traffic information if incomplete traffic information is available. Still further route calculation techniques may calculate a best route by avoiding zigzagging or evaluating an assigned cost of a potential route.
-
Citations
20 Claims
-
1. A method for managing traffic signals controlled by a signal control center to alleviate traffic flow problems associated with vehicles traveling on a road having a first lane and a second lane, each vehicle having a navigation device, the method comprising:
-
receiving location data and speed data from a navigation device in a target vehicle traveling in the first lane; receiving average vehicle speed of vehicles traveling in the first lane; receiving average vehicle speed of vehicles traveling in the second lane; determining the speed differential between the average vehicle speed of a vehicle traveling in the first lane and the average vehicle speed of a vehicle traveling in the second lane; determining the distance that the target vehicle is located from a traffic signal; and modifying a signal timing of the traffic signal, based at least in part on the determined distance and the determined speed differential. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
-
-
11. A method for coordinating traffic signals controlled by a signal control center to manage traffic flow of vehicles traveling on a road having at least a first lane and a second lane, the method comprising:
-
receiving probe data associated with a target vehicle traveling in the first lane from a navigation device in the target vehicle; receiving flow sensor data associated with an average speed of vehicles traveling on each of at least the first lane and the second lane of the road; determining a difference in speed between the average speed of vehicles traveling in each of at least the first lane and the second lane; determining a distance that the target vehicle is located from a traffic signal; and modifying at least a signal length and a signal timing associated with the traffic signal, based at least in part on the determined distance and the determined difference in speed. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18, 19, 20)
-
Specification