Method and system for optimizing road traffic control in the presence of incidents
First Claim
1. A computerized method for adjusting control parameters of a traffic management system in a presence of one or more incidents on a network, said method comprising:
- representing, using a tree format, a prioritization across network junctions, as executed by a processor on a computer;
associating weights with each junction as a function of its height in the tree; and
solving a real-time optimization of control parameters for the network, using the weights on the junctions,wherein prioritized corridors, “
green waves”
, are defined in said network, and the tree format is constructed to permit a control of traffic signals for a series of junctions in said network to be coordinated to permit waves of traffic to flow in said series of junctions, andwherein, upon an occurrence of an incident in the network and depending upon a severity level of the incident, an incident-affected junction is selectively elevated higher in the tree, and the reallocated junction weights resulting from the incident are used for solving the optimization of network control parameters.
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Abstract
A computerized method for adjusting control parameters of a traffic management system in a presence of one or more incidents on a network, said method includes representing, using a tree format, a prioritization across network junctions, as executed by a processor on a computer. Associating weights with each junction as a function of its height in the tree; and solving a real-time optimization of control parameters for the network, using the weights on the junctions, and upon an occurrence of an incident in the network and depending upon a severity level of the incident, an incident-affected junction is selectively elevated higher in the tree, and the reallocated junction weights resulting from the incident are used for solving the optimization of network control parameters.
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Citations
20 Claims
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1. A computerized method for adjusting control parameters of a traffic management system in a presence of one or more incidents on a network, said method comprising:
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representing, using a tree format, a prioritization across network junctions, as executed by a processor on a computer; associating weights with each junction as a function of its height in the tree; and solving a real-time optimization of control parameters for the network, using the weights on the junctions, wherein prioritized corridors, “
green waves”
, are defined in said network, and the tree format is constructed to permit a control of traffic signals for a series of junctions in said network to be coordinated to permit waves of traffic to flow in said series of junctions, andwherein, upon an occurrence of an incident in the network and depending upon a severity level of the incident, an incident-affected junction is selectively elevated higher in the tree, and the reallocated junction weights resulting from the incident are used for solving the optimization of network control parameters. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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13. An apparatus, comprising:
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a central processing unit (CPU); and a memory, wherein said memory has tangibly embodied thereon a set of machine-readable instructions for executing a method for adjusting control parameters of a traffic management system in a presence of one or more incidents on a network, said method comprising; representing, using a tree format, a prioritization across network junctions, as executed by a processor on a computer; associating weights with each junction as a function of its height in the tree; and solving a real-time optimization of control parameters for the network, using the weights on the junctions, wherein prioritized corridors, “
green waves”
, are defined in said network, and the tree format is constructed to permit a control of traffic signals for a series of junctions in said network to be coordinated to permit waves of traffic to flow in said series of junctions, andwherein, upon occurrence of an incident in the network and depending upon a severity level of the incident, an incident-affected junction is selectively elevated higher in the tree, and the reallocated junction weights resulting from the incident are used for solving the optimization of network control parameters. - View Dependent Claims (14, 15)
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16. A computerized method of traffic control, comprising:
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representing a network for traffic as comprising a plurality of links interconnected by a plurality of nodes; loading a traffic model for execution by a processor on a computer, the traffic model comprising a fluid model, that describes a flow of traffic within links of said network, and a junction model, that describes how traffic on an incoming link to a node is propagated to outgoing links of the node, the traffic model assigning priority weights to the nodes of the network and using the priority weights for calculating parameters for optimal traffic control in the network; receiving, as input data into the computer, indication of current traffic on the network; exercising, by the processor, the traffic model with the received input data to calculate one or more control parameters; and outputting the one or more control parameters from the computer to one or more devices in the network that control traffic flow; wherein, upon an occurrence of an incident that causes a disruption in an existing traffic flow on the network, the traffic model adapts to the incident by changing one or more of the priority weights of nodes within the network, depending upon a location in the network and a severity of the incident, wherein prioritized corridors, “
green waves”
, are defined in said network, and a tree format is constructed to permit a control of traffic signals for a series of junctions in said network to be coordinated to permit waves of traffic to flow in said series of junctions, andwherein the traffic model; includes an arrangement of nodes of the network in a hierarchy of nodes; assigns a priority weight to each node based upon its level location in the hierarchy of nodes; and adapts to incidents by modifying the hierarchy of nodes to place nodes affected by the incident at a higher level in the hierarchy of nodes, thereby providing different weights to nodes affected by the incident and permitting the traffic model to calculate values for the control parameters that automatically adapt to the incident. - View Dependent Claims (17, 18, 19, 20)
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Specification