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JP-7856127-B2 - Information processing device, information processing method, and computer program

JP7856127B2JP 7856127 B2JP7856127 B2JP 7856127B2JP-7856127-B2

Inventors

  • 吉岡 利也

Assignees

  • 住友電気工業株式会社

Dates

Publication Date
20260511
Application Date
20240809
Priority Date
20201019

Claims (7)

  1. An acquisition unit that acquires probe information of a probe vehicle traveling on an access road to an intersection, The system includes an information processing unit that uses the probe information as source data to perform a process to determine the end of the signal waiting section in the inflow path, The aforementioned decision process includes: A first process calculates multiple section speeds, which are the average speeds of vehicles in multiple sections formed by dividing the inflow passage, based on the probe information. The process includes a second process of determining the end of the signal waiting section in the inflow path based on the speeds of the multiple sections, The second process includes: An information processing device that includes a search process for searching for sections that satisfy the speed condition, where the section speed is less than or equal to a speed threshold, starting from the downstream side of the inflow path, and counting the sections that satisfy the speed condition as sections included in the signal waiting section.
  2. The second process includes: The information processing apparatus according to claim 1, which includes a process for continuing the search process if the sum of the lengths of one or more sections that do not satisfy the speed condition is less than a distance threshold.
  3. The second process includes: The information processing apparatus according to claim 1 or 2, which includes a process of determining the upstreammost section that satisfies the speed condition as the end of the signal waiting section when the sum of the lengths of the sections of one or more sections that do not satisfy the speed condition is equal to or greater than a distance threshold.
  4. The length of each of the aforementioned multiple sections is: The information processing device according to claim 3, wherein the value is smaller than the installation interval of vehicle sensors for measuring vehicle speed.
  5. The aforementioned information processing unit, When the end of the aforementioned signal waiting section is determined, The average travel time for the signal waiting section is calculated using the following formula (16): The information processing device according to claim 3, which calculates the delay time per vehicle due to waiting for a signal in the inflow road using the following formula (17). However, Ttt: Average travel time (seconds) in the section where traffic lights are stopped. Li: Length of section i (m) Vi: Average speed of section i (km/h) I: Total number of sections within the signal waiting zone i: Identification number of the section assigned sequentially from the downstream side. dav: Average delay time per vehicle due to waiting at traffic lights (seconds) Ve: Expected speed (e.g., regulated speed) (km/h)
  6. Steps include obtaining probe information from probe vehicles traveling on the road leading into the intersection, The step includes using the probe information as source data to perform a process to determine the end of the signal waiting section in the inflow path, The aforementioned decision process includes: A first process calculates multiple section speeds, which are the average speeds of vehicles in multiple sections formed by dividing the inflow passage, based on the probe information. The process includes a second process of determining the end of the signal waiting section in the inflow path based on the speeds of the multiple sections, The second process includes: An information processing method that includes a search process for searching for sections that satisfy the speed condition, where the section speed is less than or equal to a speed threshold, starting from the downstream side of the inflow road, and counting the sections that satisfy the speed condition as sections included in the signal waiting section.
  7. An acquisition unit that acquires probe information of a probe vehicle traveling on an access road to an intersection, and A computer program for causing a computer to function as an information processing unit that performs a determination process for the end of the signal waiting section in the inflow path, using the probe information as source data, The aforementioned decision process includes: A first process calculates multiple section speeds, which are the average speeds of vehicles in multiple sections formed by dividing the inflow passage, based on the probe information. The process includes a second step of determining the end of the signal waiting section in the inflow path based on the speeds of the multiple sections, The second process includes: A computer program that includes a search process for searching for sections that satisfy the speed condition, where the section speed is below a speed threshold, starting from the downstream side of the inflow road, and counting the sections that satisfy the speed condition as sections included in the signal waiting section.

Description

This disclosure relates to an information processing device, an information processing method , and a computer program. This application claims priority under Japanese application No. 2020-175372, filed on 19 October 2020, and incorporates all the provisions contained in the said Japanese application. Patent Document 1 describes a traffic indicator calculation device comprising: a first calculation unit that calculates normalized data expressing the traffic variables of the inflow road of a target intersection as a ratio to the saturated traffic flow rate; and a second calculation unit that uses the calculated normalized data to calculate a traffic indicator defined by an equation in which the traffic variables of the inflow road are included in the numerator and the saturated traffic flow rate is included in the denominator. In the calculation device described in Patent Document 1, the delay time per vehicle due to waiting at signals in the on-ramp is calculated from the average travel time of the probe vehicles, and the normalized data described above is calculated based on the calculated delay time. International Publication No. 2020/071040 An apparatus according to one aspect of this disclosure comprises: an acquisition unit that acquires probe information of a probe vehicle traveling on an inflow road to an intersection; and an information processing unit that uses the probe information as raw data to perform a calculation process for the delay time per vehicle due to waiting at a traffic light on the inflow road. The calculation process includes: a first process that calculates multiple section speeds, which are the average speeds of vehicles in multiple sections formed by dividing the inflow road, based on the probe information; a second process that calculates the total number of sections, which are the total number of sections included in the traffic light waiting section on the inflow road, based on the multiple section speeds; a third process that calculates the average travel time of the traffic light waiting section, based on the total number of sections; and a fourth process that calculates the delay time, based on the total number of sections and the average travel time of the traffic light waiting section. A method according to one aspect of this disclosure includes the steps of: acquiring probe information of a probe vehicle traveling on an access road to an intersection; and using the probe information as raw data, performing a calculation process for the delay time per vehicle due to waiting at a traffic light on the access road. The calculation process includes: a first process for calculating multiple section speeds, which are the average speeds of vehicles in multiple sections formed by dividing the access road, based on the probe information; a second process for calculating the total number of sections, which is the total number of sections included in the traffic light waiting section on the access road, based on the multiple section speeds; a third process for calculating the average travel time of the traffic light waiting section, based on the total number of sections; and a fourth process for calculating the delay time, based on the total number of sections and the average travel time of the traffic light waiting section. A computer program according to one aspect of this disclosure is a computer program for causing a computer to function as an acquisition unit that acquires probe information of probe vehicles traveling on an on-ramp to an intersection, and an information processing unit that uses the probe information as raw data to perform a calculation process for the delay time per vehicle due to waiting at a traffic light on the on-ramp. The calculation process includes: a first process that calculates multiple section speeds, which are the average speeds of vehicles for multiple sections formed by dividing the on-ramp, based on the probe information; a second process that calculates the total number of sections, which is the total number of sections included in the traffic light waiting section on the on-ramp, based on the multiple section speeds; a third process that calculates the average travel time of the traffic light waiting section, based on the total number of sections; and a fourth process that calculates the delay time, based on the total number of sections and the average travel time of the traffic light waiting section. Figure 1 is an overall diagram of the traffic signal control system.Figure 2 is a block diagram of the information processing unit, the on-board equipment of the probe vehicle, and the central unit included in the traffic signal control system.Figure 3 is a flowchart showing an overview of remote control in a comparative example.Figure 4 is a flowchart illustrating the overview of remote control in this embodiment.Figure 5 is an explanatory diagram illustrating an example of a method for calculating normalized data when the target intersection f