TRAFFIC SIMULATION SYSTEM AND TRAFFIC SIMULATION PROGRAM

• US 20130041642A1
• Filed: 04/28/2011
• Published: 02/14/2013
• Est. Priority Date: 05/12/2010
• Status: Active Grant

• Current Assignee: Mitsubishi Heavy Industries, Ltd.
• Original Assignee: Mitsubishi Heavy Industries, Ltd.
• Inventors: Tsuburaya, Shinichi
• Granted Patent: US 9,524,640 B2
• Time in Patent Office: Days
• US Class Current: 703/2
• CPC Class Codes: G01C 21/34 Route searching; Route guidance
• CPC Class Codes: G01C 21/3415 Dynamic re-routing, e.g. recalculating the route when the user deviates from calculated route or after detecting real-time traffic data or accidents
• CPC Class Codes: G06F 30/20 Design optimisation, verification or simulation optimisation, verification or simulation of circuit designs G06F30/30
• CPC Class Codes: G08G 1/0104 Measuring and analyzing of parameters relative to traffic conditions
• CPC Class Codes: H04W 40/026 Route selection considering the moving speed of individual devices
• CPC Class Codes: H04W 40/20 based on geographic position or location
• CPC Class Codes: H04W 40/28 for reactive routing

Abstract

In a traffic simulation in which vehicle models, which simulate vehicles, are moved in a road system model (40) including links (42), which simulate the smallest segment of roads divided by intersections, etc., and nodes (44), which simulate the intersections, turning points of the roads, etc., the presence/absence of an entering vehicle model that enters a different link (42) from a link (42) in the road system model (40) via the node (44) is judged; the velocity of the entering vehicle model after entering the different link (42) is calculated on the basis of the density of the vehicle models in the different link (42) after the entering vehicle model has entered the different link (42); and the calculated velocity is set only for the entering vehicle model that has entered the different link (42).

Claims

1. A traffic simulation system in which vehicle models, which simulate vehicles, are moved in a road system model that simulates a road system including a plurality of roads and intersections that connect the roads, the traffic simulation system comprising:

a judging unit for judging a presence or an absence of an entering vehicle model, which is the vehicle model that enters from a road in the road system model to a different road thereof via an intersection;

a calculating unit for calculating a velocity after entering the different road for the entering vehicle model that has been judged by the judging unit to be entering the different road on the basis of a density of the vehicle models in the different road after the entering vehicle model has entered the different road; and

a setting unit for setting the velocity calculated by the calculating unit only for the entering vehicle model that has entered the different road.

2. The traffic simulation system according to claim 1, further comprising:

an entry-origin-velocity calculating unit for calculating velocities of the vehicle models in an entry-origin road for the entering vehicle model after the entering vehicle model has entered the different road, on the basis of density of the vehicle models in the entry-origin road; and

an entry-origin-velocity setting unit for setting the velocity calculated with the entry-origin-velocity calculating unit for the vehicle models in the entry-origin road after the entering vehicle model has entered the different road.

3. The traffic simulation system according to claim 1, further comprising:

a right-turn judging unit for judging, when the judging unit judges that there is an entering vehicle model, whether or not the entering vehicle model is a right-turning vehicle which makes a right turn in order to enter the different road; and

a determining unit for determining, when the right-turn judging unit judges that the entering vehicle model is a right-turning vehicle, a possibility for the entering vehicle model to make the right turn on the basis of density and velocity of the vehicle models that act as oncoming vehicles in the road where the entering vehicle model is positioned.

4. The traffic simulation system according to claim 3, further comprising s random-number generating unit for generating a random number,

wherein the determining unit permits the entering vehicle model to make a right turn on the basis of a result of comparisons between a value of the random number generated with the random-number generating unit and a value based on the density and the velocity of the vehicle models that act as the oncoming vehicles.

6. The traffic simulation system according to claim 2, further comprising:

a right-turn judging unit for judging, when the judging unit judges that there is an entering vehicle model, whether or not the entering vehicle model is a right-turning vehicle which makes a right turn in order to enter the different road; and

a determining unit for determining, when the right-turn judging unit judges that the entering vehicle model is a right-turning vehicle, a possibility for the entering vehicle model to make the right turn on the basis of density and velocity of the vehicle models that act as oncoming vehicles in the road where the entering vehicle model is positioned.

7. The traffic simulation system according to claim 6, further comprising s random-number generating unit for generating a random number,

wherein the determining unit permits the entering vehicle model to make a right turn on the basis of a result of comparisons between a value of the random number generated with the random-number generating unit and a value based on the density and the velocity of the vehicle models that act as the oncoming vehicles.

5. A traffic simulation program employed in a traffic simulation system in which vehicle models, which simulate vehicles, are moved in a road system model that simulates a road system including a plurality of roads and intersections that connect the roads, the program causing a computer to function as

a judging unit for judging a presence or an absence of an entering vehicle model, which is the vehicle model that enters from a road in the road system model to a different road thereof via an intersection;

a calculating unit for calculating a velocity after entering the different road for the entering vehicle model that has been judged by the judging unit to be entering the different road on the basis of a density of the vehicle models in the different road after the entering vehicle model has entered the different road; and

a setting unit for setting the velocity calculated by the calculating unit only for the entering vehicle model that has entered the different road.