TRAFFIC SIGNALS CONTROL SYSTEM
First Claim
1. A method of controlling traffic signals at a road intersection which has a plurality of signal groups, each of which controls at least one direction of traffic within the intersection, the method comprising the steps of:
- (i) obtaining and utilising traffic data to calculate a current traffic state and the rate of change in the traffic state;
(ii) formulating at least one action and the duration of said action in response to the calculations obtained in step (i), wherein each action comprises switching at least one traffic signal;
(iii) resolving one or more policies based on the calculations obtained in step (i) and the action formulated in step (ii);
(iv) applying a continuous decision making process to evaluate a reward for the policies resolved in step (iii); and
(v) selecting a policy that maximizes the reward.
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0 Petitions
Accused Products
Abstract
A method of controlling traffic signals at a road intersection, which has a plurality of signal groups, each of which controls at least one direction of traffic within the intersection. The method comprises the steps of obtaining and utilising traffic data to calculate a current traffic state and the rate of change in the traffic state. The method further comprises formulating at least one action and the duration of the action in response to these calculations. Each action comprises switching at least one traffic signal. One or more policies based on the calculations and the action are resolved. A continuous decision making process is applied to evaluate a reward for the policies resolved and a policy that maximizes the reward is selected.
24 Citations
36 Claims
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1. A method of controlling traffic signals at a road intersection which has a plurality of signal groups, each of which controls at least one direction of traffic within the intersection, the method comprising the steps of:
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(i) obtaining and utilising traffic data to calculate a current traffic state and the rate of change in the traffic state; (ii) formulating at least one action and the duration of said action in response to the calculations obtained in step (i), wherein each action comprises switching at least one traffic signal; (iii) resolving one or more policies based on the calculations obtained in step (i) and the action formulated in step (ii); (iv) applying a continuous decision making process to evaluate a reward for the policies resolved in step (iii); and (v) selecting a policy that maximizes the reward. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18)
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19. A traffic signals control system comprising a control means for controlling actuators for the controlling of traffic signals at a road intersection which has a plurality of signal groups, each of which controls at least one direction of traffic within the intersection, and a traffic modeling means arranged to receive traffic data from a sensor means, the control means being operable to:
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(i) obtain and utilise the traffic data to calculate a current traffic state and the rate of change in the traffic state; (ii) formulate at least one action and the duration of said action in response to the calculations obtained in step (i), wherein each action comprises switching at least one traffic signal; (iii) resolve one or more policies based on the calculations obtained in step (i) and the action formulated in step (ii); (iv) apply a continuous decision making process to evaluate a reward for the policies resolved in step (iii); and (v) select a policy that maximizes the reward. - View Dependent Claims (20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36)
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Specification