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This paper presents a method to integrate the Dynamic Late Merge with a merge metering at the downstream taper area of a work zone, termed as Dynamic Merge Metering Traffic Control System for work zones (DMM-Tracs). The architecture and communication system for the DMM-Tracs, including system components, communication technologies and operation mechanism, are introduced. With this system, the merge metering control will be activated depending on the volume and/or speed detected at an upstream location of the work zone. If the thresholds of control parameters are met, a merge metering signal installed at the taper area will be activated and approaching vehicles will be instructed in the advance areas of the work zone. To reduce forced merges and potentials of merge conflicts, the control scheme will adjusted on the real-time basis depending on the detected traffic conditions. The delay penalty is distributed equally in all lanes. This potentially increases the efficiency with which the traffic is discharged into the open lane inside the work zone. A portable controller is the 'brain' of the DMM-Tracs System to receive data from detectors, process the data, and control the merge metering signal via wireless communications. To determine the volume threshold values and evaluate the performance of merge metering schemes in terms of delay and travel times, a simulation-based test bed is developed with the state-of-the-art microscopic simulation software VISSIM.
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