Method of correcting route data related to traffic demand and device therefor
AssigneeElectronics and Telecommunications Research Institute
InventorHyewon Song
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Abstract
A method and apparatus for correcting traffic demand-related route data is disclosed. A spatiotemporal traffic flow pattern value is calculated. At least one route data is selected from a route data pool based on the spatiotemporal traffic flow pattern value. Traffic simulation is performed based on the selected route data. Whether to correct the spatiotemporal traffic flow pattern value is determined based on a result of the traffic simulation.
Claims14
A computer-implemented method for correcting traffic demand-related route data for a road-network traffic simulation, the method comprising:
- calculating, from actually observed traffic data and estimated traffic data for a road network graph, a spatiotemporal traffic flow pattern value by spatially combining temporal traffic flow pattern values for traffic data collection spots;
- selecting, from a route data pool comprising trajectory route data and road network-based route data, at least one route data from the route data pool based on the spatiotemporal traffic flow pattern value, wherein the at least one route data is selected by weighted random sampling using the spatiotemporal traffic flow pattern value as weight information and wherein the road network-based route data is obtained by applying a route generation algorithm to the road network data;
- generating final route data by allocating a vehicle departure time to the selected at least one road data;
- performing a traffic simulation based on the selected route data including the final route data;
- determining whether to correct the spatiotemporal traffic flow pattern value based on a result of the traffic simulation;
- and
- extracting, from the result of the traffic simulation, a first traffic flow value at an actual observation spot.
A device for correcting traffic demand-related route data for a road-network traffic simulation, the device comprising:
- one or more processors;
- and
- a memory storing instructions that, when executed by the one or more processors, cause the one or more processors to:
- calculate a spatiotemporal traffic flow pattern value from actually observed traffic data and estimated traffic data for a road network graph, wherein the spatiotemporal traffic flow pattern value is generated by spatially combining temporal traffic flow pattern values for traffic data collection spots;
- select at least one route data from a route data pool based on the spatiotemporal traffic flow pattern value, wherein the route data pool comprises trajectory route data and road network-based route data, wherein the road network-based route data is obtained by applying a route generation algorithm to road network data, wherein the at least one route data is selected by weighted random sampling using the spatiotemporal traffic flow pattern value as weight information, and wherein final route data is generated by allocating a vehicle departure time to the selected at least one route data;
- and
- perform a traffic simulation based on the selected route data, and determining whether to correct the spatiotemporal traffic flow pattern value based on a result of the traffic simulation by extracting, from the result of the traffic simulation, a first traffic flow value at an actual observation spot, determining whether an error between the first traffic flow value and a second traffic flow value actually observed at the actual observation spot is less than or equal to a target value.
Dependencies are inferred from the claim text.