Method and apparatus for providing navigational guidance using the states of traffic signal
First Claim
1. A method of providing navigational guidance to a vehicle over a transportation network, said transportation network comprised of routes with traffic signals, the method comprising:
- providing, to a processor, trip information, said trip information comprising an origin and a destination for said vehicle;
setting a radius measured from a location of said vehicle within said transportation network, said radius being set based on a traffic density associated with the location of said vehicle so that a number of traffic signals are included within said radius;
providing, to the processor, said radius;
obtaining data from one or more traffic signals within said radius, at intervals of time, said data relating to one or both of the following;
information on the state of at least one of said traffic signals for a respective interval of time; and
routing table information, said routing table information indicative of state of traffic for routes to said destination on said transportation network;
processing said data with said trip information to identify optimal route choices to said destination on said transportation network for said vehicle; and
providing said optimal route choices to said vehicle.
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Abstract
A method and apparatus for predicting traffic on a transportation network where real time data points are missing. In one embodiment, the missing data is estimated using a calibration model comprised of historical data that can be periodically updated, from select links constituting a relationship vector. The missing data can be estimated off-line whereafter it can be used to predict traffic for at least a part of the network, the traffic prediction being calculated by using a deviation from a historical traffic on the network. The invention further discloses a method for in-vehicle navigation; and a method for traffic prediction for a single lane.
60 Citations
20 Claims
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1. A method of providing navigational guidance to a vehicle over a transportation network, said transportation network comprised of routes with traffic signals, the method comprising:
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providing, to a processor, trip information, said trip information comprising an origin and a destination for said vehicle; setting a radius measured from a location of said vehicle within said transportation network, said radius being set based on a traffic density associated with the location of said vehicle so that a number of traffic signals are included within said radius; providing, to the processor, said radius; obtaining data from one or more traffic signals within said radius, at intervals of time, said data relating to one or both of the following; information on the state of at least one of said traffic signals for a respective interval of time; and routing table information, said routing table information indicative of state of traffic for routes to said destination on said transportation network; processing said data with said trip information to identify optimal route choices to said destination on said transportation network for said vehicle; and providing said optimal route choices to said vehicle. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. A non-transitory computer readable medium containing an executable program for providing navigational guidance to a vehicle over a transportation network, said transportation network comprised of routes with traffic signals, wherein the program performs the steps of:
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providing, to a processor, trip information, said trip information comprising an origin and a destination for said vehicle; setting a radius measured from a location of said vehicle within said transportation network, said radius being set based on a traffic density associated with the location of said vehicle so that a number of traffic signals are included within said radius; providing, to said processor, the radius; obtaining data from one or more traffic signals within said radius, at intervals of time, said data relating to one or both of the following; information on the state of at least one of said traffic signals for a respective interval of time; and routing table information, said routing table information indicative of state of traffic for routes to said destination on said transportation network; processing said data with said trip information to identify optimal route choices to said destination on said transportation network for said vehicle; and providing said optimal route choices to said vehicle.
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13. An apparatus for providing navigational guidance to a vehicle over a transportation network, said transportation network comprised of routes with traffic signals, said apparatus comprising:
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a processor configured to receive trip information, said trip information comprising an origin and a destination for said vehicle; the processor further configured to receive a radius measured from a location of said vehicle within said transportation network, said radius being set based on a traffic density associated with the location of said vehicle so that a number of traffic signals proximate to said vehicle are included within said radius; and a receiver configured to obtain data from one or more traffic signals within said radius, at intervals of time, said data relating to one or both of the following;
information on the state of at least one of said traffic signals for a respective interval of time; and
routing table information, said routing table information indicative of state of traffic for routes to said destination on said transportation network,said processor being further configured to process said data with said trip information to identify optimal route choices to said destination on said transportation network for said vehicle, and to provide said optimal route choices to said vehicle. - View Dependent Claims (14, 15, 16, 17, 18, 19, 20)
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Specification