Prediction method for resilient interconnected traffic management
While it is well known to power traffic control devices (for example, traffic lights) by an alternative energy source during power outages, some embodiments of the present invention additionally have: (i) a set of control computer(s), remote from the various traffic control devices, that is powered by an alternative energy source during a power outage; and/or (ii) a communication network, for communications between the set of control computer(s) and the various traffic control devices, that is powered by an alternative power source during a power outage. The use of alternative power to power the control computer(s) (for example, a hub) and/or the communication network allows the traffic control devices to continue to operate in a coordinated manner as instructed by the control computers, thereby avoiding a situation where the traffic lights begin operating independently of each other during a power outage.
1. A computer-implemented method (CIM) for use with a traffic control system including a plurality of traffic control devices and a set of control computer(s), the CIM comprising:
operating the traffic control system from a primary power source, so that the plurality of traffic control devices are powered by the primary power source, the set of control computer(s) are powered by the primary power source and the traffic control devices are controlled, over a communication network, and by the set of control computer(s), in a coordinated manner such that a status for a given traffic control device depends, at least in part, upon a status of other traffic control devices at the same time or earlier;
determining that a power outage is occurring or may occur;
responsive to the determination that a power outage is occurring or is likely to occur, switching the set of control computer(s) from being powered by the primary power source to being powered by an alternative power source; and
subsequent to the switching of power source of the set of control computer(s), continuing operating the traffic control system so that the traffic control devices are controlled, over the communication network and by the set of control computer(s) in a coordinated manner such that the status for a given traffic control device depends, at least in part, upon a status of other traffic control devices at the same time or earlier.
2. The CIM of claim 1 further comprising:
during the continuing operating of the traffic control system, determining that the power outage is over; and
responsive to the determination that the power outage is over, switching the set of control computer(s) from being powered by the alternative power source to being powered by the primary power source.
3. The CIM of claim 1 wherein the alternative power source is battery power supplied by a set of battery(ies).
4. The CIM of claim 1 wherein the communication network includes wireless links to at least some of the traffic control devices of the plurality of traffic control devices.
5. The CIM of claim 1 wherein:
the traffic control system further includes condition and traffic sensors that communicate over the communication network with the set of control computer(s); and
the condition and traffic sensors can be operated on power from the primary power source and also on power from the alternative power source.
6. The CIM of claim 1 wherein the primary power source is a utility electrical power grid that serve an area where the traffic control system is located.
7. A computer-implemented method (CIM) for use with a traffic control system including a plurality of traffic control devices and a set of control computer(s), the CIM comprising:
operating the traffic control system from a primary power source, so that the plurality of traffic control devices are powered by the primary power source, the set of control computer(s) are powered by the primary power source and the traffic control devices are controlled, over a communication network, and by the set of control computer(s), in a coordinated manner such that a status for a given traffic control device depends, at least in part, upon a status of other traffic control devices at the same time or earlier;
determining that a power outage is occurring or may occur;
responsive to the determination that a power outage is occurring or is likely to occur:
switching the set of control computer(s) from being powered by the primary power source to being powered by an alternative power source, and
switching the plurality of traffic control devices from being powered by the primary power source to being powered by an alternative power source; and
subsequent to the switching of power source of the set of control computer(s) and the plurality of traffic control devices, continuing operating the traffic control system so that the traffic control devices are controlled, over the communication network and by the set of control computer(s) in a coordinated manner such that the status for a given traffic control device depends, at least in part, upon a status of other traffic control devices at the same time or earlier.
8. The CIM of claim 7 further comprising:
during the continuing operating of the traffic control system, determining that the power outage is over; and
responsive to the determination that the power outage is over:
switching the set of control computer(s) from being powered by the alternative power source to being powered by the primary power source, and
switching the plurality of traffic control devices from being powered by the alternative power source to being powered by the primary power source.
9. The CIM of claim 7 wherein the alternative power source is battery power supplied by a set of battery(ies).
10. The CIM of claim 7 wherein the communication network includes wireless links to at least some of the traffic control devices of the plurality of traffic control devices.
11. The CIM of claim 7 wherein:
the traffic control system further includes condition and traffic sensors that communicate over the communication network with the set of control computer(s); and
the condition and traffic sensors can be operated on power from the primary power source and also on power from the alternative power source.
12. The CIM of claim 7 wherein the primary power source is a utility electrical power grid that serve an area where the traffic control system is located.
13. The CIM of claim 7 wherein the plurality of traffic control devices include a plurality of traffic lights that are operated in a coordinated manner.