Travel time database generating device, method and program

• US 20070001873A1
• Filed: 06/02/2006
• Published: 01/04/2007
• Est. Priority Date: 06/21/2005
• Status: Abandoned Application

• Current Assignee: Aisin AW Company Limited (Aisin Corp.)
• Original Assignee: Aisin AW Company Limited (Aisin Corp.)
• Inventors: Ishikawa, Hiroki
• Application Number:
  US11/445,147
• Publication Number:
  US 20070001873A1
• Time in Patent Office: Days
• US Class Current: 340/994
• CPC Class Codes: G01C 21/34 Route searching; Route guidance
• CPC Class Codes: G08G 1/0104 Measuring and analyzing of parameters relative to traffic conditions

Abstract

Travel time database generating systems, methods, and programs receive a vehicle'"'"'s present location information and calculate a link travel time for each link included in the present location information. The systems, methods, and programs generate a travel time database including link travel times by estimating a travel route between the vehicle'"'"'s present locations detected every predetermined time period and calculating a link travel time of links included in the estimated travel route.

Claims

1. A travel time database generating device, comprising a controller that:

receives a vehicle'"'"'s present location information including the vehicle'"'"'s present locations detected every predetermined time period;

calculates a link travel time for each link; and

generates a travel time database including link travel times by;

estimating a travel route between the vehicle'"'"'s present locations detected every predetermined time period; and

calculating a link travel time of links included in the estimated travel route.

2. The travel time database generating device of claim 1, wherein the controller statistically processes the calculated link travel time of each link.

3. The travel time database generating device of claim 1, further comprising a memory that stores a present location database that stores information on the present location of a plurality of vehicles obtained during the predetermined time period.

4. The travel time database generating device of claim 1, wherein the controller:

estimates the travel route between two consecutively detected present locations of the vehicle by accessing map information and performing a route search; and

identifies links which the vehicle traveled on.

5. The travel time database generating device of claim 1, wherein the controller calculates a link travel time of each link by allocating the travel time between consecutively detected present locations based on a link length of each link included in the travel route.

6. The travel time database generating device of claim 5, wherein the controller statistically processes link travel times for identical links in identical time periods.

7. The travel time database generating device of claim 5, wherein the link length of each link is an actual link length.

8. The travel time database generating device of claim 5, wherein the link length of each link is a value that equals an actual link length multiplied by a coefficient, the coefficient for each link based on a respective road type of each link.

9. An information server, comprising the travel time database generating device of claim 1.

10. A travel time database generating device, comprising:

means for receiving a vehicle'"'"'s present location information including the vehicle'"'"'s present locations detected every predetermined time period;

means for calculating a link travel time;

means for generating a travel time database including link travel times;

means for estimating a travel route between the vehicle'"'"'s present locations detected every predetermined time period; and

means for calculating a link travel time of links included in the estimated travel route.

11. A travel time database generating method, comprising:

receiving a vehicle'"'"'s present location information including the vehicle'"'"'s present locations detected every predetermined time period;

calculating a link travel time for each link included in the present location information; and

generating a travel time database including link travel times by;

estimating a travel route between the vehicle'"'"'s present locations detected every predetermined time period; and

calculating a link travel time of links included in the estimated travel route.

12. The travel time database generating method of claim 11, further comprising statistically processing the calculated link travel time of each link.

13. The travel time database generating method of claim 11, further comprising storing information on the present location of a plurality of vehicles obtained during the predetermined time period.

14. The travel time database generating method of claim 11, further comprising:

estimating the travel route between two consecutively detected present locations of the vehicle by accessing map information and performing a route search; and

identifying links which the vehicle traveled on.

15. The travel time database generating method of claim 11, further comprising calculating a link travel time of each link by allocating the travel time between consecutively detected present locations based on a link length of each link included in the travel route.

16. The travel time database generating method of claim 15, further comprising statistically processing link travel times for identical links in identical time periods.

17. The travel time database generating method of claim 15, wherein the link length of each link is an actual link length.

18. The travel time database generating method of claim 15, wherein the link length of each link is a value that equals an actual link length multiplied by a coefficient, the coefficient for each link based on a respective road type of each link.

19. A storage medium storing a set of program instructions executable on a data processing device and usable to implement the method of claim 11.