Simulation Analysis Of Adjacent Traffic Signals

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Simulation Analysis Of Adjacent Traffic Signals

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Author : Kiyoshi Yamada
language : en
Publisher:
Release Date : 1983

Simulation Analysis Of Adjacent Traffic Signals written by Kiyoshi Yamada and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1983 with categories.

Simulation Analysis Of Semi Vehicle Actuated Traffic Signal Control System

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Author : Cidar Manfredo Davila
language : en
Publisher:
Release Date : 1977

Simulation Analysis Of Semi Vehicle Actuated Traffic Signal Control System written by Cidar Manfredo Davila and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1977 with Electronic traffic controls categories.

A Simulation Based Approach To Evaluate Safety Impacts Of Increased Traffic Signal Density

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Author : Kenneth P. Drummond
language : en
Publisher:
Release Date : 2002

A Simulation Based Approach To Evaluate Safety Impacts Of Increased Traffic Signal Density written by Kenneth P. Drummond and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2002 with Roads categories.

One of the most controversial access management techniques practitioners face is also one of the most common: restricting signal density. Increased signal density can improve access for minor approaches to a corridor; however, it can also increase delays and rear-end crashes for vehicles on the mainline (major) approach. An ability to evaluate the impacts of increased signal spacing is thus critical for decision makers. Because crash data are not always easy to obtain, a logical question arises: Can simulation models be used to evaluate the safety impacts of increased traffic signal density? This report describes a method for using simulation models to evaluate the safety impacts of increased traffic signal density in suburban corridors. Using 10 years of data from two major arterials in Virginia, actual crash rates were compared with operational performance measures simulated by the Synchro/SimTraffic model. As expected, crash rates were positively correlated with stops per vehicle and delay per vehicle and negatively correlated with mainline speed. Three findings were significant. First, the correlation between crash rates and select mainline performance measures (delay, speed, and stops) was relatively strong despite the inherent variability in crash rates: R2, a measure of explained variance in crash rates, yielded values from 0.54 to 0.89. Second, three distinct regimes relate stops per vehicle to signal density: the installation of the first few signals causes a drastic increase in stops, the addition of the next set of signals causes a moderate increase in stops, and the addition of a third set of signals does not significantly affect the number of stops per vehicle. Third, multiple regime models also relate delay per vehicle to signal density. This study recommends two practical applications. To the extent these mainline performance measures correlate with crashes, simulation modeling may be used to estimate safety impacts of increased signals, which is appealing because simulation packages are becoming easier to apply. Further, three regime models can suggest when, in the timeline of corridor development, the addition of a traffic signal is likely to degrade corridor performance significantly versus when it will have little effect, thereby allowing decision makers to expend political capital when it is most beneficial (e.g., the occasions when there is significant degradation of corridor performance). Most important, the approach herein suggests a long-range corridor-planning tool for evaluating the impacts of different access densities.

Multi Perspective System Wide Analyses Of Adaptive Traffic Signal Control Systems Using Microsimulation And Contemporary Data Sources

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Author : Abhay Dnyaneshwar Lidbe
language : en
Publisher:
Release Date : 2016

Multi Perspective System Wide Analyses Of Adaptive Traffic Signal Control Systems Using Microsimulation And Contemporary Data Sources written by Abhay Dnyaneshwar Lidbe and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2016 with Electronic dissertations categories.

The primary function of traffic signals is to assign the right of way to vehicular and pedestrian traffic at intersections. Effective traffic signal system reduces congestion, increases intersection capacity, and improves other traffic related performance measures such as safety and mobility. To ensure these goals are met, traffic signals require updated timings to maintain proper operation. These updated signal timings impact not only traffic performance, but overall transportation system efficiency. Because traditional signal timing plans may not accommodate variable and unpredictable traffic demands, a more proactive approach is necessary to ensure properly timed and maintained traffic signals. Adaptive traffic control systems (ATCS) continually collect data and optimize signal timing on a real time basis thereby reducing the aforementioned drawbacks of traditional signal retiming. Understanding and characterizing how these systems are working is important to transportation engineers, and evaluating these systems can provide useful insights. The objective of this dissertation is to develop evaluation methodologies (both operational and economical) for adaptive traffic signal control that go beyond the traditional assessments that use traffic measures of effectiveness (MOEs). Case studies are conducted for Sydney Coordinated Adaptive Traffic System (SCATS) implementations in Alabama, which are useful in objective evaluations of ATCS (in general) for both their current and future operational environments by using microsimulation techniques and/or field data from contemporary data sources. The study contains detailed comparative analyses of traffic operations of the study corridors for existing peak hour traffic conditions under the previous time-of-day (TOD) plan and similar peak hour conditions after SCATS implementation. Although simulation analysis using VISSIM traffic microsimulation software is the primary methodological technique used for evaluating comparative performances, arterial data from other sources (Bluetooth MAC Address Matching and crowdsourced travel data) are also used to perform the evaluations, which is a novel application for this context. While past studies have considered either the arterial or its side-streets performances in their evaluations, this work explored a system-wide approach looking at the composite performance of both dimensions together. Finally, for transportation agencies which operate within budget constraints, it is important to know the real worth of attaining the benefits from ATCS implementations. The last chapter of this dissertation extends the evaluation methodology to include benefit-cost analysis (BCA) by evaluating the ATCS performance for both current and future traffic conditions. This information will be helpful for transportation agencies, planners, and practitioners to understand and justify their ATCS investment and also serve as a guideline for their future ITS projects.

Analysis And Simulation Of Adaptive Traffic Signals

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Author : David Richard Wirkkala
language : en
Publisher:
Release Date : 1993

Analysis And Simulation Of Adaptive Traffic Signals written by David Richard Wirkkala and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1993 with Adaptive control systems categories.

Handbook Of Driving Simulation For Engineering Medicine And Psychology

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Author : Donald L. Fisher
language : en
Publisher: CRC Press
Release Date : 2011-04-25

Handbook Of Driving Simulation For Engineering Medicine And Psychology written by Donald L. Fisher and has been published by CRC Press this book supported file pdf, txt, epub, kindle and other format this book has been release on 2011-04-25 with Technology & Engineering categories.

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

An Interactive Simulation Program For Intersection Design And Operational Analysis

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Author : Roger A. Plum
language : en
Publisher:
Release Date : 1989

An Interactive Simulation Program For Intersection Design And Operational Analysis written by Roger A. Plum and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1989 with Computer simulation categories.

Simulation Optimization Of Traffic Light Signal Timings Via Perturbation Analysis

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Author :
language : en
Publisher:
Release Date : 2006

Simulation Optimization Of Traffic Light Signal Timings Via Perturbation Analysis written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2006 with categories.

Optimization Of A Traffic Signal System Through Computer Simulation Final Report

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Author : Gary W. Davies
language : en
Publisher:
Release Date : 1972

Optimization Of A Traffic Signal System Through Computer Simulation Final Report written by Gary W. Davies and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1972 with categories.

Analysis Of Traffic Spatial Shift Resulting From Optimal Signal Timing And Special Generators

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Author : Suyono Dikun
language : en
Publisher:
Release Date : 1988

Analysis Of Traffic Spatial Shift Resulting From Optimal Signal Timing And Special Generators written by Suyono Dikun and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1988 with Traffic assignment categories.