Simulation of Flashing Signal Operations

Simulation of Flashing Signal Operations

Author: Luis E. Moreno

Publisher:

Published: 1982

Total Pages: 56

ISBN-13:

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Various guidelines that have been proposed for the operation of traffic signals in the flashing mode were reviewed. The use of existing traffic simulation procedures to evaluate flashing signals was examined and a study methodology for simulating and evaluating potential flashing signal schemes was developed. A case study is described in which the performance of existing signal settings versus flashing signal strategies was tested for different levels of main street and side street traffic volumes. The study showed that the main street flow improves with flashing signals in its favor under all circumstances, while increased volumes typically create longer delays at the side street. Major and side street traffic volumes are recommended as the focus of guidelines for using flashing signals during peak flow periods.


Microscopic Simulation Model of Traffic Operations at Intersections in Malfunction Flash Mode

Microscopic Simulation Model of Traffic Operations at Intersections in Malfunction Flash Mode

Author: Valerio Oricchio

Publisher:

Published: 2007

Total Pages:

ISBN-13:

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When a malfunction occurs in a traffic signal controller cabinet, the signal is automatically placed into malfunction flash mode as a safety precaution. During this event, drivers are presented with one of two possible scenarios: flashing yellow on the major street and flashing red on the minor street, or flashing red on all the approaches. Volumes and percentages of car stopping were collected at fifty-one study intersections in the Atlanta regions. By means of the VISSIM microsimulation software a sample of intersections was simulated under the two malfunction scenarios and the signalized one. Based on output data such as delay and queue, the performances of each simulated intersection is compared and recommendations on which mode of flash must be used in case of malfunction are provided.


Analysis of Off-peak Traffic Signal Operations

Analysis of Off-peak Traffic Signal Operations

Author: Anuar Amanzholov

Publisher: ProQuest

Published: 2008

Total Pages:

ISBN-13: 9780549813880

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A traffic signal plays a major role in the overall safety and efficiency of traffic operations at an intersection. The type of operation strategy and signal timings utilized are typically based on the designed operation of the intersection at a desired Level of Service during peak traffic conditions. However, during off-peak traffic periods, the same strategy could cause extensive vehicle delay when much lower traffic volumes are present. The main objective of the study is to define the existing off-peak issues and propose solutions to mitigate problems. This study describes various off-peak period issues and includes reviews of modern traffic signal control systems. It also entails an evaluation of different traffic signal operation strategies which can be deployed to mitigate the off-peak issues. This study also covers flashing signal controls and adaptive control systems. Another objective is to perform a computer simulation which is included to extend the scope of the research. The results showed that upgrades and optimization of traffic signal controls can be an efficient way to decrease number of stops, gas consumption and vehicle emissions. The results of the study showed that actuated traffic signal controls are the best solution for low traffic volume periods. Implementation of actuated traffic controls can decrease overall delay, number of stops, gas consumption and vehicle emissions.


Handbook of Driving Simulation for Engineering, Medicine, and Psychology

Handbook of Driving Simulation for Engineering, Medicine, and Psychology

Author: Donald L. Fisher

Publisher: CRC Press

Published: 2011-04-25

Total Pages: 728

ISBN-13: 1420061011

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Effective use of driving simulators requires considerable technical and methodological skill along with considerable background knowledge. Acquiring the requisite knowledge and skills can be extraordinarily time consuming, yet there has been no single convenient and comprehensive source of information on the driving simulation research being conduc


Traffic Signal Timing Manual

Traffic Signal Timing Manual

Author: U.s. Department of Transportation

Publisher: CreateSpace

Published: 2015-02-20

Total Pages: 286

ISBN-13: 9781508557173

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This report serves as a comprehensive guide to traffic signal timing and documents the tasks completed in association with its development. The focus of this document is on traffic signal control principles, practices, and procedures. It describes the relationship between traffic signal timing and transportation policy and addresses maintenance and operations of traffic signals. It represents a synthesis of traffic signal timing concepts and their application and focuses on the use of detection, related timing parameters, and resulting effects to users at the intersection. It discusses advanced topics briefly to raise awareness related to their use and application. The purpose of the Signal Timing Manual is to provide direction and guidance to managers, supervisors, and practitioners based on sound practice to proactively and comprehensively improve signal timing. The outcome of properly training staff and proactively operating and maintaining traffic signals is signal timing that reduces congestion and fuel consumption ultimately improving our quality of life and the air we breathe. This manual provides an easy-to-use concise, practical and modular guide on signal timing. The elements of signal timing from policy and funding considerations to timing plan development, assessment, and maintenance are covered in the manual. The manual is the culmination of research into practices across North America and serves as a reference for a range of practitioners, from those involved in the day to day management, operation and maintenance of traffic signals to those that plan, design, operate and maintain these systems.