Traffic control system, vehicle control system, traffic regulation system, and traffic control method
First Claim
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1. A traffic control system comprising:
- an infrastructure device that sets a target vehicle travel speed based on a correlation between a vehicle travel speed and a traffic volume;
a road-vehicle communication device that transmits the target vehicle travel speed to multiple vehicles that are on a road and are each capable of controlling their travel in accordance with the target vehicle travel speed, the vehicles automatically controlling engine and brake systems of each of the vehicles based on the target vehicle travel speed;
whereinthe infrastructure device determines a predicted traffic volume at a vehicle travel direction ahead region that is located ahead of the multiple vehicles on the road in a vehicle travel direction; and
the infrastructure device sets the target vehicle travel speed based on the predicted traffic volume such that a volume of traffic that flows at the target vehicle travel speed in the vehicle travel direction ahead region is equal to or larger than the predicted traffic volume and is within a travel speed range that avoids a shift in traffic volume to a critical phase at which traffic congestion may result from external disturbances causing the traffic volume to exceed a critical density.
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Abstract
A traffic control system sets a target value related to a travel state based on a correlation between a vehicle travel speed and a traffic volume, and controls multiple vehicles (CS) on a road in accordance with the target value as a common target value. The target value can be set based on a predicted traffic volume at a region (103) that is ahead of, in a vehicle travel direction, the multiple vehicles on the road. For example, the traffic control system sets, as the target value, a target speed or a target value of a parameter related to an inter-vehicle distance.
39 Citations
11 Claims
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1. A traffic control system comprising:
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an infrastructure device that sets a target vehicle travel speed based on a correlation between a vehicle travel speed and a traffic volume; a road-vehicle communication device that transmits the target vehicle travel speed to multiple vehicles that are on a road and are each capable of controlling their travel in accordance with the target vehicle travel speed, the vehicles automatically controlling engine and brake systems of each of the vehicles based on the target vehicle travel speed;
whereinthe infrastructure device determines a predicted traffic volume at a vehicle travel direction ahead region that is located ahead of the multiple vehicles on the road in a vehicle travel direction; and the infrastructure device sets the target vehicle travel speed based on the predicted traffic volume such that a volume of traffic that flows at the target vehicle travel speed in the vehicle travel direction ahead region is equal to or larger than the predicted traffic volume and is within a travel speed range that avoids a shift in traffic volume to a critical phase at which traffic congestion may result from external disturbances causing the traffic volume to exceed a critical density. - View Dependent Claims (2, 3, 4, 5, 6)
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7. A combination comprising:
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a traffic control system that sets a target vehicle travel speed based on a correlation between a vehicle travel speed and a traffic volume and that transmits the target vehicle travel speed to multiple vehicles that are on a road and are each capable of controlling their travel in accordance with the target vehicle travel speed, the traffic control system determining a predicted traffic volume at a vehicle travel direction ahead region that is located ahead of the multiple vehicles on the road in a vehicle travel direction, and setting the target vehicle travel speed based on the predicted traffic volume such that a volume of traffic that flows at the target vehicle travel speed in the vehicle travel direction ahead region is equal to or larger than the predicted traffic volume and is within a travel speed range that avoids a shift in traffic volume to a critical phase at which traffic congestion may result from external disturbances causing the traffic volume to exceed a critical density; and a vehicle control system comprising; a communication device by which the vehicle control system of a predetermined vehicle receives the target vehicle travel speed from the traffic control system and sends information to the traffic control system; and an electronic control unit that automatically controls an engine system and a brake system of the predetermined vehicle based on the received target vehicle travel speed.
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8. A traffic control method implemented by a traffic control system, the method comprising:
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setting, via an infrastructure system that is separate from vehicles, a target vehicle travel speed based on a correlation between a vehicle travel speed and a traffic volume; and controlling a first vehicle and a second vehicle on a road in accordance with the target vehicle travel speed, the controlling being performed by electronic control units of each of the first and second vehicles, wherein the target vehicle travel speed is transmitted by a transmitter of the infrastructure system to the first and second vehicles, which are each capable of controlling their own travel in accordance with the target vehicle travel speed via their respective electronic control units, the electronic control units automatically control the first and second vehicles by controlling engine and brake systems of each of the vehicles based on the target vehicle travel speed, and the infrastructure system sets the target vehicle travel speed based on a determined predicted traffic volume at a vehicle travel direction ahead region that is located ahead of the first and second vehicles on the road in a vehicle travel direction such that a volume of traffic that flows at the target vehicle travel speed in the vehicle travel direction ahead region is equal to or larger than the predicted traffic volume and is within a travel speed range that avoids a shift in traffic volume to a critical phase at which traffic congestion may result from external disturbances causing the traffic volume to exceed a critical density. - View Dependent Claims (9, 10, 11)
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Specification