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Evaluation Of Mobility Impacts Of Temporary Ramp Metering In Work Zones

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Evaluation Of Mobility Impacts Of Temporary Ramp Metering In Work Zones

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Author : Naghma Hassan
language : en
Publisher:
Release Date : 2012

Evaluation Of Mobility Impacts Of Temporary Ramp Metering In Work Zones written by Naghma Hassan and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2012 with categories.

Road maintenance has been growing in the United States and brings a variety of challenges to the transportation profession. Work zone congestion is one of the most important factors contributing to the delay and safety of freeways. Many control methodologies have been applied to work zones in order to reduce freeway congestion and delay. One means of control is ramp metering, which has been deployed since 1963 in the United States and has proven to be successful. This thesis' objective is to evaluate and simulate the effect of ramp metering on freeway work zones; traffic performance measures such as delay, speed, and number of stops are used for the evaluation. A literature review showed that a main factor contributing to the freeway work zone delay is a high percentage of commercial trucks. Due to the role of truck percentage in work zone performance, effectiveness of ramp metering in work zone control is evaluated with different truck percentages. The lane configuration for all the studied sites work zones was 2 lanes to 1 lane, because it's frequency in real-world applications. In the evaluation of ramp metering in work zones, the traffic volumes investigated were less than, equal to, and more than capacity (650vph, 1240vph, and 1854vph). Mainline (a link used for trough traffic) truck percentage and ramp truck percentage varied from 10% to 40%, and 10% to 20%, respectively. As a result, a total of 8 cases were created and simulated using VISSIM traffic simulation software.

Evaluating Alternative Operations Strategies To Improve Travel Time Reliability

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Author : National Academies of Sciences, Engineering, and Medicine (U.S.)
language : en
Publisher: Transportation Research Board
Release Date : 2022-03-29

Evaluating Alternative Operations Strategies To Improve Travel Time Reliability written by National Academies of Sciences, Engineering, and Medicine (U.S.) and has been published by Transportation Research Board this book supported file pdf, txt, epub, kindle and other format this book has been release on 2022-03-29 with Business & Economics categories.

This report from the second Strategic Highway Research Program (SHRP 2), which is administered by the Transportation Research Board of the National Academies, sets out requirements for travel time reliability within a performance-based planning process. The research includes an effort to determine the economic value of improvements in travel time reliability by applying options theory from the financial sector. The report includes two succinct tables that describe requirements for person and freight trips for reliable transport, as well as a forecast of the year 2030 under alternative assumptions that may influence travel time reliability.

Guidelines For Developing Transportation Management Plans In Virginia

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Author : Benjamin H. Cottrell
language : en
Publisher:
Release Date : 2005

Guidelines For Developing Transportation Management Plans In Virginia written by Benjamin H. Cottrell and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2005 with Roads categories.

A transportation management plan (TMP) is a comprehensive program of traffic control, communication, operation, and demand management strategies designed to maintain acceptable levels of traffic flow in work zones. A systematic procedure and/or checklist is needed for developing plans to lessen the impact of construction projects that restore or improve highways. The purpose of this research was to establish guidelines for developing TMPs for construction projects. Three questions were addressed by the guidelines: When should a TMP be developed? How should a TMP be developed? What should be in a TMP? The Federal Highway Administration published the Final Rule on Work Zone Safety and Mobility on September 9, 2004. It facilitates the comprehensive consideration of the broader safety and mobility impacts of work zones across project development stages and the adoption of additional strategies including TMPs that help manage these impacts during project implementation. Guidelines for TMPs were derived from a draft implementation guide for the final rule with minor revisions. TMPs may consist of up to three components: (1) a temporary traffic control plan that describes traffic control measures used to facilitate road users through a work zone; (2) transportation operations strategies that will be used to ease work zone impacts; and (3) public information strategies to inform those affected by the project of the expected work zone impacts and changing conditions. At a minimum, each TMP should have a temporary traffic control plan. It is recommended that the Virginia Department of Transportation implement the guidelines developed in this study.

Us Infrastructure

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Author : Aman Khan
language : en
Publisher: Routledge
Release Date : 2019-09-17

Us Infrastructure written by Aman Khan and has been published by Routledge this book supported file pdf, txt, epub, kindle and other format this book has been release on 2019-09-17 with Political Science categories.

This book presents an in-depth look at US infrastructure and its challenges in the 21st century. While infrastructure has received considerable attention in recent years, much of the discussion has concentrated on physical, economic, or noneconomic conditions. The Trump administration has heightened interest in the topic, promising infrastructure spending during his tenure, yet little demonstrable progress has been made. This book brings together a multi-disciplinary perspective—structural, technological, economic, financial, political, planning, and policy—that has been largely absent in discussions on the subject, to provide a clearer and broader understanding of the challenges facing US infrastructure. The book is divided into three parts: Part I looks at the challenges from a structural, technological, and sustainability perspective; Part II from an economic, productivity, and finance perspective; and Part III from an institutional, security, and political perspective. Written primarily for policy makers, managers, and administrators in public and private organizations, as well as individuals and academics with an interest in the future of US infrastructure, this book provides an in-depth analysis of the US infrastructure problem, its causes and consequences, and suggests timely, specific measures that may be taken at the state, local, and federal levels to improve and better secure our roads, transit, public buildings, economy, and technology.

Evaluation Of Temporary Ramp Metering For Work Zone Safety

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Author : Zhongyuan Zhu
language : en
Publisher:
Release Date : 2012

Evaluation Of Temporary Ramp Metering For Work Zone Safety written by Zhongyuan Zhu and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2012 with categories.

Ramp metering has been successfully implemented in many states and studies have documented its positive mobility and safety benefits. However, there have been no studies on the use of ramp metering for work zones. This thesis reports the results from the first deployment of temporary ramp meters in work zones in the United States. Temporary ramp meters were deployed at seven work zones in Missouri. Due to lack of crash data, this study uses video data to extract alternative safety measures such as driver compliance, merging behavior, speed differentials, lane changing, and braking maneuvers. This evaluation suggests that temporary ramp meters should only be deployed at work zone locations where there is potential for congestion and turned on only during periods of high congestion. In comparison to over 90% compliance rates of permanent ramp meters implemented in other states, field data showed compliance rates from 40.5% to 82.9% in temporary ramp meter. This suggested that non-compliance could be a major safety issue in the deployment of temporary ramp meters. The use of a three-section instead of a traditional two-section signal head used for ramp metering produced significantly higher compliance rates. This thesis then aggregated the data into groups to further analyze the effects of different factors such as platoons, commercial trucks, work zone type and work zone-ramp configuration. After analyzing general characteristics of mainline and ramp vehicle speed and speed differentials, this study then focused on findings for different comparison groups. The two comparison groups are "between two work zones" versus "before work zone" configuration and "left-lane closed" versus "right-lane closed" work zone type. Results indicated lower mean speeds of mainline and ramp vehicles and higher differentials when ramp metering was turned on. This is expected and again temporary ramp meters are recommended only where congestion occurs. Congestion will lead to lower mainline speeds thus lower speed differentials either with or without ramp metering. Finally, analysis of merging headways showed that temporary ramp meters were effective in separating platoons before vehicles merged into mainline. This produces more single-vehicle merging which requires shorter gaps and causes fewer impacts on the mainline traffic.

Urban Human Mobility

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Author : Xiao Huang
language : en
Publisher: CRC Press
Release Date : 2025-07-03

Urban Human Mobility written by Xiao Huang and has been published by CRC Press this book supported file pdf, txt, epub, kindle and other format this book has been release on 2025-07-03 with Science categories.

This comprehensive handbook covers human mobility within urban contexts, integrating academic theories with pragmatic insights and offering a detailed analysis of the diverse facets of human mobility and its substantial impact on the urban landscape, economy, and societal structures. It explains key fundamental concepts, methods, and models, presenting an in-depth exploration of predictive analytics, clustering patterns, advanced trajectory embedding techniques, artificial intelligence, machine learning, geographic information systems (GIS), Internet of Things (IoT), and smart city innovations. The authors include many case studies and examples of urban mobility in practice, making the content relatable and practical for educators, students, researchers, and practitioners. Features Provides a multidisciplinary and holistic understanding of urban mobility with systematic introductions and discussions of theory, methods, technologies, tools, and applications Covers a wide range of real-world case studies of urban mobility in practice globally that include data, programming code, and tools Discusses cutting-edge technologies involved in mobility data analytics Addresses practical challenges in data collection and the ethical implications of mobility research, which are crucial for professionals in the field Offers future directions of human mobility research under the big data and artificial intelligence (AI) revolution Urban Human Mobility: Practices, Analytics, and Strategies for Smart Cities is for professionals, academics, and upper-level undergraduate and graduate students in the fields of urban planning/design, GIScience, data mining, and social sciences.

Statistical Methods And Safety Data Analysis And Evaluation

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Author : National Research Council (U.S.). Transportation Research Board
language : en
Publisher:
Release Date : 2004

Statistical Methods And Safety Data Analysis And Evaluation 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 Roads categories.