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Author: Kevin N. Balke Publisher: ISBN: Category : Traffic signs and signals Languages : en Pages : 88
Book Description
The purpose of this research was to examine the type of performance measures that could be collected at an intersection and develop a system for automatically collecting these performance measures in the field.. We began the research by conducting an assessment ofthe needs of the Texas Department of Transportation (TxDOT) practitioners for an automated system to collect intersection and traffic signal performance measures. We then examined capabilities of some of the existing traffic signal controllers and detection systems to produce the desired performance measures. Based on the findings of the needs assessments and an evaluation of the limitation of the existing detection system, we developed a series of innovative performance measures that practitioners could use to assess traffic operations and the effectiveness of the signal timing at intersections. We then developed a prototype system for automatically collecting these data in the field. We installed the prototype system in two different locations that exhibited different operating characteristics and assessed the ability of the system to collect meaningful and appropriate performance measures.
Author: Kevin N. Balke Publisher: ISBN: Category : Traffic signs and signals Languages : en Pages : 88
Book Description
The purpose of this research was to examine the type of performance measures that could be collected at an intersection and develop a system for automatically collecting these performance measures in the field.. We began the research by conducting an assessment ofthe needs of the Texas Department of Transportation (TxDOT) practitioners for an automated system to collect intersection and traffic signal performance measures. We then examined capabilities of some of the existing traffic signal controllers and detection systems to produce the desired performance measures. Based on the findings of the needs assessments and an evaluation of the limitation of the existing detection system, we developed a series of innovative performance measures that practitioners could use to assess traffic operations and the effectiveness of the signal timing at intersections. We then developed a prototype system for automatically collecting these data in the field. We installed the prototype system in two different locations that exhibited different operating characteristics and assessed the ability of the system to collect meaningful and appropriate performance measures.
Author: Brandon L. Nevers Publisher: ISBN: 9780309673631 Category : Electronic traffic controls Languages : en Pages : 0
Book Description
Management of traffic signal systems is a critical function for every transportation agency. Thanks to advancements in technology, it is now possible to collect large amounts of data at signalized intersections, leading to the development of dozens of performance measures. The TRB National Cooperative Highway Research Program's pre-publication draft of NCHRP Research Report 954: Performance-Based Management of Traffic Signals provides information to help agencies invest in signal performance measures as part of a comprehensive approach to performance-based management. Supplementary materials to the report include a data dictionary and a PowerPoint presentation.
Author: Li Zhang Publisher: ISBN: Category : Roads Languages : en Pages : 137
Book Description
The object of this study is to explore Automated Traffic Signal Performance Measures in the state of Mississippi. This report documents the implementation of Automated Traffic Signal Performance Measures Ver 4.2 developed by Utah/Georgia Department of Transportation (U/GDOT) in Mississippi. Eleven intersections along Highway 12 in Starkville, Mississippi, have been added to the system. Those measures include 12 GDOT/UDOT performances matrices and two traffic signal systems status reports by the project team. The major contributions of this study are the documentation and validation of the performance measures development process by analyzing U/GDOT source code. We also indicate the limitations of the ATSPM.
Author: Christopher M. Day Publisher: Joint Transportation Research Program ISBN: 9781622602803 Category : Transportation Languages : en Pages : 134
Book Description
This monograph is a synthesis of research carried out on traffic signal performance measures based on high-resolution controller event data, assembled into a methodology for performance evaluation of traffic signal systems. High-resolution data consist of a log of discrete events such as changes in detector and signal phase states. A discussion is provided on the collection and management of the signal event data and on the necessary infrastructure to collect these data. A portfolio of performance measures is then presented, focusing on several different topics under the umbrella of traffic signal systems operation. System maintenance and asset management is one focus. Another focus is signal operations, considered from the perspectives of vehicle capacity allocation and vehicle progression. Performance measures are also presented for nonvehicle modes, including pedestrians, and modes that require signal preemption and priority features. Finally, the use of travel time data is demonstrated for evaluating system operations and assessing the impact of signal retiming activities.
Author: Kevin N. Balke Publisher: ISBN: Category : Traffic signs and signals Languages : en Pages : 50
Book Description
This report documents the first year of a two-year research project to develop potential measures that might be used to assess the performance of traffic signal timing at isolated intersections. This report summarizes the findings of a series of interviews we conducted to detennine what measures the Texas Department of Transportation (TxDOT) is currently using to assess the perfonnance of their traffic signals and how data for these perfonnance measures are collected. It also contains the results of an examination of existing controller and detection technologies to determine what capabilities they have to produce performance measures. The report presents several proposed measures that can be used to assess the performance of signal timing and the procedures for computing these performance measures using existing detection technologies.
Author: Robert L. Gordon Publisher: Transportation Research Board National Research ISBN: Category : Technology & Engineering Languages : en Pages : 90
Book Description
TRB's National Cooperative Highway Research Program (NCHRP) Synthesis 409: Traffic Signal Retiming Practices in the United States explores practices that operating agencies currently use to revise traffic signal timing. The report examines the processes used to develop, install, verify, fine-tune, and evaluate the plans--
Author: Natasha Petrovska Publisher: Springer ISBN: 3319333194 Category : Computers Languages : en Pages : 59
Book Description
In response to the need to improve road traffic operation, researchers implement advanced technologies and integration of systems and data, and develop state-of-the-art applications to assist traffic engineers. This SpringerBrief introduces three novel Web applications which can be an exceptional resource and a good visualization tool for traffic operators, managers, and analysts to monitor the congestion, and analyze incidents and signal performance measures. The applications offer more detailed analysis providing users with insights from different levels and perspectives. The benefit of providing these automated and interactive visualization tools is more efficient estimation of the local transport networks’ performance, thus facilitating the decision making process in case of emergency events.
Author: Robert L. Gordon Publisher: Transportation Research Board ISBN: 0309069505 Category : Electronic traffic controls Languages : en Pages : 96
Book Description
TRB's National Cooperative Highway Research Program (NCHRP) Synthesis 307: Systems Engineering Processes for Developing Traffic Signal Systems discusses the systems engineering techniques available to traffic signal systems and identifies the key processes in a number of traffic signal systems engineering areas.
Author: Christopher M. Day Publisher: Purdue University Press ISBN: 9781622600908 Category : Transportation Languages : en Pages : 244
Book Description
Increasing demand for highway system capacity compels transportation agencies to extract as much capacity as possible from existing systems. Traffic signals represent a major component of highway systems. Improvement of traffic signal operation requires accurate performance measures. Despite recent improvements in computing technology, traffic signal controllers are currently not able to capture useful performance measures on a cycle-by-cycle basis. This report presents a set of performance measures that could be collected on a cycle-by-cycle basis by a traffic signal controller given the capability to log phase indications and detector actuations. The performance measures investigated here include the volume-to-capacity ratio and arrival type defined by the Highway Capacity Manual. The effectiveness of these performance measures in evaluating operation at a traffic signal is demonstrated in two comparative case studies. The first study investigates the impact of actuating a portion of the coordinated phases at a coordinated arterial intersection. The second study investigates the results of retiming a traffic signal on a coordinated arterial.
Author: Kevin N. Balke
Author: Kevin N. Balke
Author: Brandon L. Nevers
Author: Brandon L. Nevers
Author: Li Zhang
Author: Christopher M. Day
Author: Kevin N. Balke
Author: Robert L. Gordon
Author: Natasha Petrovska
Author: Robert L. Gordon
Author: Christopher M. Day