Patent ID: 8103436

Claim:
A method for controlling traffic movements for a plurality of traffic intersections each having a volume of traffic comprising: determining a critical intersection having a most conflicting volume from among the volumes; determining a plan comprising at least one guaranteed green time and at least one minimum green duration for at least one direction of traffic movement at the critical intersection and a period for the plan; determining other plans each comprising another guaranteed green time and another minimum green duration for another intersection based on the at least one guaranteed green time and the at least one minimum green duration at the critical intersection and an expected travel time between the critical intersection and the other intersection, each other plan having another period; determining at least one non-linear schedule for the critical intersection at an external adaptive control system based on the plan and queue lengths for individual phases at the critical intersection, the non-linear schedule comprising a plurality of states having a variable order, each state having a state start time and a state duration; determining other non-linear schedules for the other intersections at other external adaptive control systems based on the other plans and other queue lengths for other individual phases for the other intersections, each other non-linear schedule comprising another plurality of other states having another state order, each other state having another state start time and another state duration; controlling at least one traffic signal controller assembly at the critical intersection by the external adaptive control system according to the at least one non-linear schedule; and controlling other traffic signal controller assemblies at the other intersections by the other external adaptive control systems according to the other non-linear schedules.