Modern proactive control algorithms can perform real-time traffic state prediction and help determine control plans for active traffic control measures, such as ramp metering (RM) and variable speed limit (VSL). In this study, a control algorithm, DynaTAM (Dynamic Analysis Tool for Active Traffic Demand Management), is proposed for prediction-based, integrated optimization control. DynaTAM considers the correlations between the implemented control measures and determines the control plan for both RM and VSL at the same stage of optimization. The algorithm framework possesses a candidate control plan generator, which reduces the computational load of future optimizations and eliminates much of the uncertainty in the system performance. A field-data-based simulation study with different control scenarios is conducted to evaluate the performance of DynaTAM. The DynaTAM control algorithm is shown to not only effectively perform integrated and coordinated control using both RM and VSL, but also significantly improve the efficiency of traffic operations during peak hours.Résumé : Les algorithmes modernes de contrôle proactif peuvent réaliser des prévisions de l'état de la circulation en temps réel et aider à déterminer des plans de contrôle pour des mesures actives de contrôle de la circulation; ces algorithmes comprennent la régulation de bretelles d'accès (RM) et la limite de vitesse variable (VSL). Dans cette étude, un algorithme de contrôle, DynaTAM (Dynamic Analysis Tool for Active Traffic Demand Management), est proposé pour le contrôle de l'optimisation intégrée basé sur les prévisions. DynaTAM tient compte des corrélations entre les mesures de contrôles implantées et détermine le plan de contrôle pour la RM et la VSL à la même étape d'optimisation. Le cadre de l'algorithme présente un générateur de plans de contrôle admissibles, ce qui réduit la charge de calcul des optimisations futures et élimine une grande partie de l'incertitude quant au rendement du système. Une étude de simulation basée sur les données de terrain comportant plusieurs scénarios de contrôle, est réalisée pour évaluer le rendement de DynaTAM. L'algorithme de contrôle DynaTAM non seulement réalise un contrôle intégré et coordonnée de manière efficace en utilisant RM et VSL, mais améliore grandement l'efficacité des opérations de circulation durant les heures de pointe. [Traduit par la Rédaction] Mots-clés : régulation des bretelles d'accès, VSL, ATM, contrôle de circulation proactif, contrôle intégré et coordonné.
Congestion can restrict access to construction activities both on and close to a freeway, reducing construction efficiency, especially by delaying the delivery of materials. Although previous studies have investigated the impact of work-zone capacities on traffic flow, most did not consider interactions with construction resources. There is currently no mature standard or acceptable model that can be used for this purpose, and that would benefit both traffic and construction in an integrated framework; however, well-established, powerful simulation systems exist unique to each domain. To this end, in this paper, a construction-traffic interdisciplinary simulation (CTISIM) framework based on high level architecture is proposed to combine the power of each domain's simulation systems. A ready-mixed concrete production and delivery problem is adopted to demonstrate the benefit of the CTISIM, which optimizes construction resource arrangement and a concrete production schedule based on the real-time traffic conditions in a work-zone.
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