Development And Evaluation Of Operational Strategies For Providing An Integrated Diamond Interchange Ramp Metering Control System
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Development And Evaluation Of Operational Strategies For Providing An Integrated Diamond Interchange Ramp Metering Control System
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Author : Zongzhong Tian
language : en
Publisher:
Release Date : 2004
Development And Evaluation Of Operational Strategies For Providing An Integrated Diamond Interchange Ramp Metering Control System written by Zongzhong Tian and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2004 with categories.
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 been 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. One drawback of operating the ramp-metering system and the diamond interchange system in isolation is that traffic from the ramp, particularly if it is metered, can spill back into the diamond interchange, causing both congestion and safety concerns at the diamond interchange. While flushing the ramp queues by temporarily suspending ramp metering has been the primary strategy for preventing queue spillback, it can result in freeway system breakdown, which would affect the entire system's efficiency. The aim of this research was to develop operational strategies for managing an integrated diamond interchange ramp-metering system (IDIRMS). Enhanced modeling methodologies were developed for an IDIRMS. A computer 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 the enhanced modeling methodologies developed in this study and could be used to perform system analysis for an IDIRMS given a set of system input parameters and variables. DRIVE was validated against a VISSIM microscopic simulation model, and general agreement was found between the two models. System operational characteristics were investigated using DRIVE to gain a better understanding of the system features. Integrated control strategies (ICS) were developed based on the two commonly used diamond interchange phasing schemes, basic three-phase and TTI four-phase. The ICS were evaluated using VISSIM microscopic simulation under three general traffic demand scenarios: low, medium, and high, as characterized by the volume-to-capacity ratios at the metered ramps. The results of the evaluation indicate that the integrated operations through an adaptive signal control system were most effective under the medium traffic demand scenario by preventing or delaying the onset of ramp-metering queue flush, thereby minimizing freeway breakdown and system delays.
Development And Evaluation Of A Framework For Selecting Operational Strategies For An Integrated Diamond Interchange
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Author : Zongzhong Tian
language : en
Publisher:
Release Date : 2004
Development And Evaluation Of A Framework For Selecting Operational Strategies For An Integrated Diamond Interchange written by Zongzhong Tian and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2004 with Electronic traffic controls categories.
A Model For Evaluating Integration Strategies For Operating Diamond Interchange And Ramp Metering
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Author : Zongzhong Tian
language : en
Publisher:
Release Date : 2003
A Model For Evaluating Integration Strategies For Operating Diamond Interchange And Ramp Metering written by Zongzhong Tian and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2003 with Express highway interchanges categories.
Dissertation Abstracts International
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Author :
language : en
Publisher:
Release Date : 2004
Dissertation Abstracts International written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2004 with Dissertations, Academic categories.
Freeway Operations And Traffic Signal Systems 2004
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Author : National Research Council (U.S.). Transportation Research Board
language : en
Publisher:
Release Date : 2004
Freeway Operations And Traffic Signal Systems 2004 written by National Research Council (U.S.). Transportation Research Board and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2004 with Electronic traffic controls categories.
TRB?s Transportation Research Record: Journal of the Transportation Research Board 1867 examines several algorithms that estimate speed from traffic surveillance cameras in a variety of traffic, weather, and lighting conditions; identify bottleneck locations, the active times, and the delays that are caused; and are applied to the archived loop detector data in the I-4 data warehouse.
Transportation Research Record
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Author :
language : en
Publisher:
Release Date : 1974
Transportation Research Record written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1974 with Electronic traffic controls categories.
Ramp Metering Algorithms And Approaches For Texas
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Author :
language : en
Publisher:
Release Date : 2004
Ramp Metering Algorithms And Approaches For Texas written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2004 with Algorithms categories.
The primary objective of this project was to compare ramp metering algorithms and develop guidelines for improving ramp metering operations in Texas. As part of this research project, researchers collected data at several sites in Houston, Texas. Data analysis showed that many congested freeways are facing heavy ramp demand, and require significant changes in existing ramp metering operations if ramp metering continues to be used as part of freeway traffic management. Furthermore, researchers used computer simulation to compare the effectiveness of ALINEA with queue flush with the existing strategy of metering at the maximum rate with queue flushing. Researchers found that ALINEA does not provide any benefits when queue flushing is permitted. Under heavy demand conditions such as those in Houston, the current strategy to meter at the fastest rate remains the most beneficial. However, this strategy also provides limited benefits. Finally, researchers developed guidelines and recommendations for current and future ramp metering operations in Texas. This report documents the research results.
Hris Abstracts
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Author : National Research Council (U.S.). Highway Research Information Service
language : en
Publisher:
Release Date : 1976
Hris Abstracts written by National Research Council (U.S.). Highway Research Information Service and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1976 with Highway engineering categories.
Integrated Arterial And Freeway Operation Control Strategies For Ivhs Advanced Traffic Management Systems
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Author :
language : en
Publisher:
Release Date : 1998
Integrated Arterial And Freeway Operation Control Strategies For Ivhs Advanced Traffic Management Systems written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1998 with DYNASMART (Computer file) categories.
The main focus of this study is congestion, primarily that occurring on freeway corridors in metropolitan areas. Lack of coordination in the operation of various components of the system is often a major source of inefficiency, resulting in greater delays to motorists than what might be achievable with the existing physical infrastructure. The main objective of the study is to improve corridor network management by coordinating the various control elements in a freeway corridor, for both recurrent and nonrecurrent congestion situations.
Control Strategies For Signalized Diamond Interchanges
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Author : United States. Federal Highway Administration. Implementation Division
language : en
Publisher:
Release Date : 1978
Control Strategies For Signalized Diamond Interchanges written by United States. Federal Highway Administration. Implementation Division and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1978 with Electronic traffic controls categories.
A comparative study of 5 signal timing control methods indicated that the most efficient method of signal control is the micrioprocessor which would allow an intersection to operate under actuated control during certain periods of the day and under predetermined timing patterns during other periods. The 5 signal timing methods considered were: Traffic Engineering Method, FHWA Design Manual Method, Fully Actuated Operation Method, Microprocessor with lagging Left-Turn Method, and Microprocessor with Leading Left-Turn Method. The "before" and "after" evaluation of these methods was made by pairing them in a series of six comparisons using time-lapse photography to supply vehicle data. The site selected for application of these comparisons was the Diamond Interchange of Interstate 95 Golfair Boulevard in Jacksonville, Florida. The study procedure is appropriate for signal timing studies made at: a diamond interchange, other interchange configurations with a ramp terminal and nearby signalized intersections, and a 2-way major street intersected by one or more one-way street pairs.