Method and apparatus for providing navigation guidance
First Claim
1. A method for providing navigation guidance via a land vehicle comprising the steps of:
- providing a navigation route planner having a road network database for planning a navigation route along a road network;
determining a current estimated position of the land vehicle;
communicating maneuver instructions to a driver of the land vehicle at a predetermined maneuver distance base value before the land vehicle reaches a required maneuver along a planned navigation route;
detecting and quantifying current environmental travel conditions for assisting a navigation apparatus in guiding the land vehicle along the planned navigation route;
adjusting at least one of maneuver instructions and navigation route planning based on the detected and quantified current environmental travel conditions; and
wherein said detecting of the current environmental travel conditions includes detecting an ambient temperature, a speed of windshield wiper movement, time of day, an amount of light, humidity, a traffic congestion level, and distance between the land vehicle and any immediately preceding and trailing vehicles.
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Accused Products
Abstract
A method and apparatus (10) for providing navigation guidance via a land vehicle by providing a navigation route planner (24) having a road network database (12) for planning a navigation route along the road network, determining a current estimated position of the land vehicle, communicating maneuver instructions to a driver of the land vehicle at a predetermined maneuver distance base value before the land vehicle reaches a required maneuver along the planned navigation route, and detecting and quantifying current environmental travel conditions for assisting a navigation device in guiding the land vehicle along the planned navigation route.
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Citations
16 Claims
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1. A method for providing navigation guidance via a land vehicle comprising the steps of:
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providing a navigation route planner having a road network database for planning a navigation route along a road network; determining a current estimated position of the land vehicle; communicating maneuver instructions to a driver of the land vehicle at a predetermined maneuver distance base value before the land vehicle reaches a required maneuver along a planned navigation route; detecting and quantifying current environmental travel conditions for assisting a navigation apparatus in guiding the land vehicle along the planned navigation route; adjusting at least one of maneuver instructions and navigation route planning based on the detected and quantified current environmental travel conditions; and wherein said detecting of the current environmental travel conditions includes detecting an ambient temperature, a speed of windshield wiper movement, time of day, an amount of light, humidity, a traffic congestion level, and distance between the land vehicle and any immediately preceding and trailing vehicles. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A method for providing navigation guidance via a land vehicle comprising the steps of:
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providing a navigation route planner having a road network database for planning a navigation route along a road network; determining a current estimated position of the land vehicle; communicating maneuver instructions to a driver of the land vehicle at a predetermined maneuver distance base value before the land vehicle reaches a required maneuver along a planned navigation route; quantifying information from the road network database into a plurality of static factors, wherein each static factor is formed from at least one of maneuver type factors and road attribute factors, wherein each maneuver type factor and road attribute factor corresponds to a maneuver on the planned navigation route; detecting and quantifying environmental information into a dynamic factor, wherein the dynamic factor is formed from at least one of a traffic pattern factor and a weather condition factor including information representing an ambient temperature, a speed of windshield wiper movement, a time of day, and an amount of light; combining the dynamic factor and a static factor corresponding to each required maneuver into an integrated distance increment factor; and adjusting the maneuver distance base value for each maneuver based on the integrated distance increment factor. - View Dependent Claims (9, 10, 11, 12)
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13. A land vehicle navigation apparatus comprising:
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a navigation computer including a route planner having a road network data base for planning a navigation route along the road network; a current position determining device operably coupled to the navigation computer for determining an estimated current position of the land vehicle; a maneuver instruction communication device operably coupled to the navigation computer and the current position determining device for communicating maneuver instructions to a driver of the land vehicle to guide the driver along the planned route; and sensors operably coupled to the navigation computer for sensing current environmental travel conditions for assisting the navigation apparatus in guiding the driver along the planned route, wherein the sensors include sensors for sensing an ambient temperature, a speed of windshield wiper movement, time of day, an amount of light, humidity, a ratio of land vehicle speed to a speed limit, and a distance between the land vehicle and an immediately preceding vehicle. - View Dependent Claims (14, 15, 16)
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Specification