Research Article
Distributed Cooperative Backpressure-Based Traffic Light Control Method
Algorithm 1
The algorithm of intersection i for activating phase decision and conflicts resolution.
| If SelectedStrategy.DownstreamIntersection1 = 0 And SelectedStrategy.DownstreamIntersection2 = 0 Then | | Intersectioni.DeterminedFlag = True | | Intersectioni.SelectedPhase = SelectedStrategy.phase | | Let the selected phase be the activating phase in the next time slot. | | Broadcast the decision of Intersectioni to the adjacent intersections. | | End If | | If Intersectioni.DeterminedFlag = False Then | | If STLCAi receives the decisions from adjacent intersections Then | | For each AdjacentIntersection of Intersectioni | | If AdjacentIntersectionj.DetermineFlag = True Then | | Release the strategies of Intersectioni conflicting with AdjacentIntersectionj.SelectedPhase | | End If | | Next | | Reselect the Intersectioni.SelectedStrategy with maximum pressure from the available strategies | | Broadcast Intersectioni.SelectedStrategy to the adjacent intersections. | | End If | | Elect the maximum pressure strategy among the available strategies of all intersections using distributed election algorithm. | | If Intersectioni.SelectedStrategy is the elected strategy with maximum pressure Then | | Intersectioni. DeterminedFlag = True | | Intersectioni. SelectedPhase = SelectedStrategy.phase | | Let the selected phase be the activating phase in the next time slot. | | Broadcast the decision of Intersectioni to the adjacent intersections. | | End If | | End If |
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