Estimation of actual conditions of a roadway segment by weighting roadway condition data with the quality of the roadway condition data
First Claim
1. A computer-implemented method of estimating actual conditions of a roadway segment embodied on a non-transitory computer readable medium, the method comprising:
- providing roadway condition data to a processor for a plurality of data points along the roadway segment from a plurality of different sources of the roadway condition data, wherein the plurality of different sources are organized by source types, wherein a hierarchy defines which type of source is used for estimating actual conditions when data from the type of source is available, and wherein the hierarchy has an order of (i) real-time data, (ii) incident data, and (iii) historical data;
assigning a weight function to each source of the real-time data and the incident data, wherein the weight function is based on quality of the data provided by the source; and
estimating in the processor the actual conditions for each of the data points of the roadway segment by using the roadway condition data from only the type of source defined by the hierarchy, wherein if the real-time data or the incident data are used to estimate the actual conditions, the processor calculates a weighted sum of the roadway condition data using the assigned weight functions.
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Accused Products
Abstract
Actual conditions of a roadway segment are estimated by providing roadway condition data to a processor for the roadway segment from a plurality of different types of sources of the roadway condition data, assigning a quality to each of the plurality of different types of sources of the roadway condition data, and estimating in the processor the actual conditions of the roadway segment by using the roadway condition data and the quality of each of the plurality of different types of sources of the roadway data. The quality determines weightings given to each of the plurality of different types of sources.
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Citations
20 Claims
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1. A computer-implemented method of estimating actual conditions of a roadway segment embodied on a non-transitory computer readable medium, the method comprising:
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providing roadway condition data to a processor for a plurality of data points along the roadway segment from a plurality of different sources of the roadway condition data, wherein the plurality of different sources are organized by source types, wherein a hierarchy defines which type of source is used for estimating actual conditions when data from the type of source is available, and wherein the hierarchy has an order of (i) real-time data, (ii) incident data, and (iii) historical data; assigning a weight function to each source of the real-time data and the incident data, wherein the weight function is based on quality of the data provided by the source; and estimating in the processor the actual conditions for each of the data points of the roadway segment by using the roadway condition data from only the type of source defined by the hierarchy, wherein if the real-time data or the incident data are used to estimate the actual conditions, the processor calculates a weighted sum of the roadway condition data using the assigned weight functions. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A computer-implemented method of estimating actual conditions of a roadway segment embodied on a non-transitory computer readable medium, the method comprising:
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receiving road condition data for a plurality of data points along the roadway segment, wherein the road condition data is classified as real-time data, incident data, or historical data; determining a source of the road condition data; if the road condition data is classified as real-time data or incident data, obtaining a predetermined weight function for the source of the roadway condition data, wherein the predetermined weight function is based on quality of the data provided by the source; estimating actual conditions for each of the data points along the roadway segment using a single classification of road condition data in an availability order of real-time data, incident data, and historical data, wherein if the real-time data is available then the actual conditions are estimated by calculating a weighted sum of the real-time data using the predetermined weight function for the source of the real-time data. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18, 19)
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20. A computer-implemented method of estimating actual conditions of a roadway segment embodied on a non-transitory computer readable medium, the method comprising:
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receiving roadway condition data, wherein the roadway condition data includes data from multiple data sources, wherein the data sources are organized by source types including at least one of real-time data, incident data, and historic data; selecting a single type of roadway condition data in a hierarchical manner such that the real-time data is selected if available, the incident data is selected if available and the real-time data is not available, and the historical data is selected if the real-time and the incident data are not available; if the real-time data or the incident data is selected, obtaining a weight function for each source of the real-time data or the incident data, wherein the weight function is based on quality of the data provided by the source; if the weight function is obtained, calculating a speed function using the weight function otherwise using the historic data as the speed function; calculating a travel time for traveling through a roadway segment using the speed function; and outputting an estimation of actual conditions of the roadway segment based on the calculated travel time.
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Specification