Patent ID: 9053632
Filing Date: 2015-06-09
Classification: G08G

Abstract:
1. A method implemented using a computer for determining traffic speeds related to at least one vehicle traveling in a transportation network, the method comprising: receiving by the computer a plurality of real-time GPS-based speed records, wherein the real-time GPS-based speed records relate to real-time vehicle speeds in the transportation network; receiving by the computer a plurality of historical speed records from a secondary source of speed data, wherein the historical speed records relate to historical vehicle speeds in the transportation network and wherein the historical speed records cover a time period; determining by the computer a first characteristic of real-time GPS-based speed records of a first type; determining by the computer a second characteristic of real-time GPS-based speed records of a second type, wherein the speed records of the first type indicate a higher speed than the speed indicated by the speed records of the second type; determining by the computer a third characteristic of a combination of the real-time GPS-based speed records of the first type and the second type; determining by the computer, for each of a plurality of sub-time periods included in the time period, a fourth characteristic of historical speed records of the first type; determining by the computer, for each of the plurality of sub-time periods included in the time period, a fifth characteristic of historical speed records of the second type; determining by the computer, for each of the plurality of sub-time periods included in the time period, a sixth characteristic of a combination of the historical speed records of the first type and the second type; and determining by the computer traffic speeds related to the at least one vehicle traveling in the transportation network from the historical speed records of a selected one of the plurality of sub-time periods, wherein the selected one of the plurality of sub-time periods is chosen as the period in which a combination of the first, second and third characteristics is most similar to a combination of the fourth, fifth and sixth characteristics; wherein the first characteristic is a count of real-time GPS-based speed records of the first type; wherein the second characteristic is a count of real-time GPS-based speed records of the second type; wherein the third characteristic is one of: (a) a ratio of: a count of real-time GPS-based speed records of the first type to a count of real-time GPS-based speed records of the second type; (b) a mean value of a combination of the real-time GPS-based speed records of the first and second types; and (c) a variance value of a combination of the real-time GPS-based speed records of the first and second types; wherein the fourth characteristic is a count of historical speed records of the first type; wherein the fifth characteristic is a count of historical speed records of the second type; wherein the sixth characteristic is one of: (a) a ratio of: a count of historical speed records of the first type to a count of historical speed records of the second type; (b) a mean value of a combination of historical speed records of the first and second types; and (c) a variance value of a combination of historical speed records of the first and second types; and wherein the period in which a combination of the first, second and third characteristics is most similar to a combination of the fourth, fifth and sixth characteristics is determined by utilizing a weighted sum of ranks calculation.