This book addresses the modeling methodologies and operational strategies for managing integrated diamond interchange ramp-metering traffic control systems. Diamond interchanges and their associated ramps are where the surface street arterial system and the freeway system interface. Historically, these two elements of the system have operated with little or no coordination between the two. Therefore, there is a lack of both analysis tools and operational strategies for considering them as an integrated system. A model named DRIVE (Diamond Interchange and Ramp Metering Integration Via Evaluation) was developed, which was characterized as a mesoscopic simulation and analysis model. DRIVE incorporated some enhanced modeling methodologies and can perform system analysis in an integrated fashion given a set of system input parameters and variables. System operational characteristics were investigated using DRIVE to gain a better understanding of the system features. Integrated control strategies were developed based on commonly used phasing schemes for signalized diamond interchanges.

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