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Trans. Planning Journal
| Title | Adaptive Signal Control via an Intelligent Traffic Controller |
|---|---|
| Author | Tang-Hsien Chang, Zhi-Hua Chang |
| Summary | This study develops an adaptive signal control logic for an intelligent traffic controller “TCIS” (Traffic Communication and Information Station). The method uses two stages rolling on the projection horizon for vehicle estimation and phase-changing decision, which modifies the OPAC (Optimization Policies for Adaptive Control) model. The proposed method can save time for decision-making, and reduce errors from detectors. A system for application and simulation of the proposed model is built. The performance criteria guiding the decision model is the total delay time, estimated on the basis of queue lengths for all the approaches. For the simulations of the study, the model works well in conditions of under saturation. The delay observed is reduced when V/C is lower than 0.7. This constitutes an improvement compared to a pretime system. The optimal effect occurs when V/C has a value of 0.5. However, when V/C approaches 0.8, the proposed model gradually becomes equivalent to a pretime system. |
| Vol. | 33 |
| No. | 1 |
| Page | 203 |
| Year | 2004 |
| Month | 3 |
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