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Author: Catherine Ann Cragg
Publisher:
ISBN:
Category : CORSIM (Computer file)
Languages : en
Pages : 36
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Book Description
Freeway incident management has become an important issue in departments of transportation nationwide. With many of the nation's roadways operating very close to capacity under the best of conditions, the need to reduce the impact of incident-related congestion has become critical. One way to achieve this reduction is to improve the management of traffic after an incident has occurred, including the use of traffic diversion strategies. Very often, however, diversion strategies are employed without proper consideration given to the effect of such a strategy on the alternate route, which in many cases is congested prior to the addition of diverted traffic. Careful analysis of diversion strategies, which includes examination of the operational characteristics of both the freeway and alternate routes, can lead to much more efficient and effective strategies. This project establishes a methodology for analyzing diversion strategies using CORSIM, a microscopic simulation model developed by the Federal Highway Administration capable of simultaneously analyzing freeway and arterial roadways. The model process for incident specification and simulation was tested and applied to several case studies. The results of the study show that the model is a valuable tool in analyzing diversion strategies; the critical freeway volume at which diversion becomes advantageous can be determined, as can bottleneck locations on the alternate routes. Signal timing adjustments can be tested and fine-tuned to achieve the ideal maximum flow along the diversion route.
Author: Catherine Ann Cragg
Publisher:
ISBN:
Category : CORSIM (Computer file)
Languages : en
Pages : 36
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Book Description
Freeway incident management has become an important issue in departments of transportation nationwide. With many of the nation's roadways operating very close to capacity under the best of conditions, the need to reduce the impact of incident-related congestion has become critical. One way to achieve this reduction is to improve the management of traffic after an incident has occurred, including the use of traffic diversion strategies. Very often, however, diversion strategies are employed without proper consideration given to the effect of such a strategy on the alternate route, which in many cases is congested prior to the addition of diverted traffic. Careful analysis of diversion strategies, which includes examination of the operational characteristics of both the freeway and alternate routes, can lead to much more efficient and effective strategies. This project establishes a methodology for analyzing diversion strategies using CORSIM, a microscopic simulation model developed by the Federal Highway Administration capable of simultaneously analyzing freeway and arterial roadways. The model process for incident specification and simulation was tested and applied to several case studies. The results of the study show that the model is a valuable tool in analyzing diversion strategies; the critical freeway volume at which diversion becomes advantageous can be determined, as can bottleneck locations on the alternate routes. Signal timing adjustments can be tested and fine-tuned to achieve the ideal maximum flow along the diversion route.
Author: C. A. Cragg
Publisher:
ISBN:
Category :
Languages : en
Pages : 24
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Book Description
Author: Luis Raul Campana
Publisher:
ISBN:
Category : Disabled vehicles on express highways
Languages : en
Pages : 138
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Book Description
Author: Fred L. Mannering
Publisher:
ISBN:
Category : Express highways
Languages : en
Pages : 54
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Book Description
Report / by Fred Mannering [and others] -- v. 1. Management, surveillance, control, and evaluation of freeway incidents : a review of existing literature / by Bryan Jones, Fred Mannering --v. 2. Analysis of freeway incidents in the Seattle area / by Bryan Jones [and others] -- v. 3. Seattle-area incident impact analysis : Microcomputer traffic simulation results / by Dan H. Garrison, Fred Mannering, Brad Sebranke -- v. 4. Seattle-area incident management : assessment and recommendations / by Fred Mannering, Bryan Jones, Brad Sebranke.
Author: Xiaobing Li
Publisher:
ISBN:
Category : Traffic congestion
Languages : en
Pages : 207
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Book Description
En route traffic diversions have been identified as one of the effective traffic operations strategies in traffic incident management. The employment of such traffic operations will help relieve the congestion, save travel time, as well as reduce energy use and tailpipe emissions. However, little attention has been paid to quantifying the benefits by deploying such traffic operations under large-scale traffic incident-induced congestion on freeways, specifically under the connected vehicle environment. New Connected and Automated Vehicle technology, known as "CAV", has the potential to further increase the benefits by deploying en route traffic diversions. This dissertation research is intended to study the benefits of en route traffic diversion by analyzing large-scale incident-related characteristics, as well as optimizing the signal plans under the diversion framework. The dissertation contributes to the art of traffic incident management by 1) understanding the characteristics of large-scale traffic incidents, and 2) developing a framework under the CAV to study the benefits of en route diversions. Towards the end, 4 studies are linked together for the dissertation. The first study will be focusing on the analysis of the large-scale traffic incidents by using the traffic incident data collected on East Tennessee major roadways. Specifically, incident classification, incident duration prediction, as well as sequential real-time prediction are studied in detail. The second study mainly focuses on truck-involved crashes. By incorporating injury severity information into the incident duration analysis, the second study developed a bivariate analysis framework using a unique dataset created by matching an incident database and a crash database. Then, the third study estimates and evaluates the benefit of deploying the en route traffic diversion strategy under the large-scale traffic incident-induced congestion on freeways by using simulation models and incorporating the analysis outcomes from the other two studies. The last study optimizes the signal timing plans for two intersections, which generates some implications along the arterial corridor under connected vehicles environment to gain more benefits in terms of travel timing savings for the studies network in Knoxville, Tennessee. The implications of the findings (e.g. faster response of agencies to the large-scale incidents reduces the incident duration, penetration of CAVs in the traffic diversion operations further reduces traffic network system delay), as well as the potential applications, will be discussed in this dissertation study.
Author: Shawn Curtis Birst
Publisher:
ISBN:
Category : Automatic data collection systems
Languages : en
Pages : 98
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Book Description
Author: Walter M. Dunn
Publisher: Transportation Research Board
ISBN: 9780309068598
Category : Technology & Engineering
Languages : en
Pages : 96
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Book Description
This synthesis report will be of interest to officials of municipal, regional, and statewide transportation and law enforcement agencies who are responsible for roadway incident diversion practices. It will also be of interest to others who interact with these agencies to achieve a better understanding of the processes, barriers, and technologies associated with alternate route plan development and deployment. This report presents state-of-the-practice information about the development and implementation of roadway incident diversion practices. It documents specific trends in the practice, and in examining individual practices, identifies unique plans, processes, and technologies from which other agencies may find useful applications. This TRB report addresses a broad list of topics associated with roadway incident diversion and profiles successful incident diversion practices, as reported by surveyed agencies. In particular, it focuses concern on alternate route plans for random incidents, those resulting in nonrecurring congestion.
Author: Fred L. Mannering
Publisher:
ISBN:
Category : Express highways
Languages : en
Pages : 164
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Book Description
Report / by Fred Mannering [and others] -- v. 1. Management, surveillance, control, and evaluation of freeway incidents : a review of existing literature / by Bryan Jones, Fred Mannering --v. 2. Analysis of freeway incidents in the Seattle area / by Bryan Jones [and others] -- v. 3. Seattle-area incident impact analysis : Microcomputer traffic simulation results / by Dan H. Garrison, Fred Mannering, Brad Sebranke -- v. 4. Seattle-area incident management : assessment and recommendations / by Fred Mannering, Bryan Jones, Brad Sebranke.
Author:
Publisher:
ISBN:
Category : Electronic traffic controls
Languages : en
Pages : 44
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Book Description
Author: Wade H. Shafer
Publisher: Springer Science & Business Media
ISBN: 1461303931
Category : Science
Languages : en
Pages : 427
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Book Description
Masters Theses in the Pure and Applied Sciences was first conceived, published, and disseminated by the Center for Information and Numerical Data Analysis and Synthesis (CINDAS)* at Purdue University in 1957, starting its coverage of theses with the academic year 1955. Beginning with Volume 13, the printing and dis semination phases of the activity were transferred to University Microfilms/Xerox of Ann Arbor, Michigan, with the thought that such an arrangement would be more beneficial to the academic and general scientific and technical community. After five years of this joint undertaking we had concluded that it was in the interest of all concerned if the printing and distribution of the volumes were handled by an international publishing house to assure improved service and broader dissemination. Hence, starting with Volume 18, Masters Theses in the Pure and Applied Sciences has been disseminated on a worldwide basis by Plenum Publishing Corporation of New York, and in the same year the coverage was broadened to include Canadian universities. All back issues can also be ordered from Plenum. We have reported in Volume 39 (thesis year 1994) a total of 13,953 thesis titles from 21 Canadian and 159 United States universities. We are sure that this broader base for these titles reported will greatly enhance the value of this impor tant annual reference work. While Volume 39 reports theses submitted in 1994, on occasion, certain uni versities do report theses submitted in previous years but not reported at the time.
