Download or read book Optimizing Work Zone Practices for Highway Construction Projects written by Tarek M. Elghamrawy and published by . This book was released on 2011 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Recent studies indicate that work zones suffer from an increasing trend of deaths and injuries in and around the highway construction areas with an average of 745 fatalities and 40,700 severe injuries per year. To control and minimize work zone fatalities and injuries, the Federal Highway Administration (FHWA), American Association of State Highway and Transportation Officials (AASHTO), and many state Departments of Transportation (DOTs) are seeking to improve the design practices of work zones to reduce work zone crashes. To support this vital and pressing highway safety goal, this research study focuses on analyzing and optimizing existing work zone practices and exploring the effectiveness and efficiency of innovative temporary rumble strips that can be used to minimize crashes in and around highway construction and maintenance projects. The research objectives of this study are to: (1) provide enhanced understanding of the impact of work zone parameters and innovative temporary traffic control devices on the safety of highway construction zones; (2) analyze work zone crashes and current practices to identify potential layout parameters that impact work zone crash occurrence; (3) investigate and quantify the impact of work zone layout parameters on the risk and cost of crash occurrence; (4) optimize work zone setup parameters to minimize total work zone costs including agency, user delay, and expected crash costs; (5) conduct field experiments to analyze the efficiency and constructability of various arrangements of temporary rumble strips prior to and at the edge of work zones; and (6) study and enhance the effectiveness of temporary rumble strips in alerting inattentive drivers prior to and at the edge of work zones. In order to achieve these objectives, the study is conducted in seven major tasks that focus on: (1) conducting a comprehensive literature review; (2) collecting and fusing all available data and reports on work zone crashes in Illinois; (3) analyzing work zone crashes and identifying the probable causes and contributing factors; (4) identifying the impact of layout parameters on risk of crash occurrence; (5) developing an optimization model to minimize total work zone costs including agency cost, user delay cost, and expected work zone crash cost; (6) performing field experiments on temporary rumble strips and evaluate the efficiency of utilization on site; and (7) evaluating the effectiveness of temporary rumble strips prior and at the edge of work zones. The main research developments of this study are expected to have significant impacts on (1) identifying potential work zone parameters and contributing causes that impact work zone crash occurrence; (2) estimating the probability of work zones to encounter severe crashes; (3) quantifying the impact of work zone parameters on the risk levels of crash occurrence; (4) estimating the monetary value of work zone crashes based on work zone layout parameters; (5) searching for and identifying optimal work zone setup solutions that specify segment length, operating speed, TTC policy, and concrete barrier at different operation staring times; (6) developing new efficient prototypes of temporary rumble strips to be utilized prior to and at the edge of work zones; and (7) developing practical guidelines for effective design arrangements of temporary rumble strips. These new developments hold a strong promise to: (a) improve work zone safety for both the travelling public and construction workers; (b) improve current work zone layouts, strategies, and standards; (c) provide a baseline for controlling the risk of crash occurrence due to highway work zones; (d) assist construction planners in identifying optimal work zone setups for highway construction; (e) direct the development of practical recommendations for efficient and effective design arrangements of temporary rumble strips; and (f) reduce work zone crashes in the work area through the implementation of practical temporary rumble strips arrangements.
Download or read book Work Zone Operations written by and published by DIANE Publishing. This book was released on 2000 with total page 328 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Contract Time Optimization Methodologies for Highway Construction Projects written by Yi Jiang and published by Purdue University Press. This book was released on 2009-03-01 with total page 114 pages. Available in PDF, EPUB and Kindle. Book excerpt: This study was conducted to develop methodologies for appropriately determining the monetary values of I/D rates of highway construction projects in Indiana. In this study, a comprehensive literature review was performed to identify possible effective methodologies for work zone effects, construction impacts, and contract time optimization. The highway production rates were developed in a previous study. The production rates were validated and adjusted with the help from INDOT field engineers. The weigh-in-motion (WIM) collected traffic data were obtained, processed, and analyzed to provide input data for user cost calculations at highway work zones. Construction data were obtained and processed to develop the relationship between the construction cost and construction time. With the traffic and construction data, the methods for user cost calculations were developed as the basis of determining appropriate I/D rates. User costs resulting from traffic delays at Indiana highway work zones were analyzed. A series of equations for estimating user costs at work zones were developed. User cost calculation sheets using MS Excel were developed based on the traffic data on Indiana highway network. Finally, a method was developed to determine I/D rates based on the relationship between construction cost and construction time in combination with the estimated user costs at given work zones. Guidelines for developing A+B bidding and I/D provisions were provided.
Download or read book Work Zone Operations Best Practices Guidebook written by U.s. Department of Transportation and published by CreateSpace. This book was released on 2015-02-21 with total page 294 pages. Available in PDF, EPUB and Kindle. Book excerpt: This Work Zone Best Practices Guidebook provides an easily accessible compilation of work zone operations practices used and recommended by various States and localities around the country. The Guidebook is a reference document that can be updated with new approaches, technologies, and practices for effectively managing work zones and reducing the impacts of work zones on mobility and safety as they are identified. The best practices are descriptive, not prescriptive. They describe approaches that have been successfully used by transportation agencies, along with contact information to find out more from the agency using the practice. Each organization must determine which of these practices are best suited for its particular situation, considering all the site-specific factors that affect work zone operations.
Download or read book Strategies for Work Zone Transportation Management Plans written by Leverson Boodlal and published by . This book was released on 2020 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: One of the ways a state department of transportation or other transportation agency can address work zone safety and other impacts is to develop and implement a Transportation Management Plan (TMP). The TRB National Cooperative Highway Research Program's NCHRP Research Report 945: Strategies for Work Zone Transportation Management Plans provides a practitioner-ready guidebook on how to select and implement strategies that improve safety and traffic operations in roadway construction work zones. Supplemental materials to the report include NCHRP Web-Only Document 276: Evaluating Strategies for Work ZoneTransportation Management Plans; fact sheets on ramp meter, reversible lane, and truck restrictions; and guidebook appendices.
Download or read book Optimizing the Construction Planning of Highway Work Zones written by Ahmed Zafer Abdelmohsen and published by . This book was released on 2016 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Techniques for Effective Highway Construction Projects in Congested Urban Areas written by Thomas R. Warne and published by Transportation Research Board. This book was released on 2011 with total page 87 pages. Available in PDF, EPUB and Kindle. Book excerpt: TRB's National Cooperative Highway Research Program (NCHRP) Synthesis 413: Techniques for Effective Highway Construction Projects in Congested Urban Areas explores a diverse set of techniques designed to address highway construction challenges in congested urban areas such as high-traffic volumes, utility conflicts, complex right-of-way acquisition issues, a diverse stakeholder base, and watchful news media. The report includes four case studies designed to help illustrate effective construction practices in congested urban areas.
Download or read book Work Zone Impacts Assessment written by and published by . This book was released on 2006 with total page 188 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Safety by Design written by Daniel C. Murray and published by . This book was released on 2005 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: As the U.S. population and economy continue to grow, more pressure is being placed on the nation's road and bridge infrastructure today than at any point in history. This growth has left the nation's system of roads and bridges in a perpetual state of repair. As all motorists are aware, road maintenance and construction work projects often cause significant traffic congestion, as well as contribute to an increasing number of accidents and fatalities. Work zone-related crashes that involve large trucks are often more serious and more likely to result in fatalities. In order to mitigate the consequences of large truck crashes in work zones, research is needed to understand the causes of truck accidents in work zones and from those findings, develop appropriate countermeasures to reduce the frequency and severity of large truck work zone crashes. The American Transportation Research Institute (ATRI) initiated this research to investigate the factors that contribute to truck-involved work zone accidents. The research first looked at characteristics of large truck-involved work zone crashes and found that differences exist in the time of day and day of week of occurrence, as well as the number of vehicles typically involved and the type of crash (rear-end, sideswipe, etc.) for large truck work zone crashes versus all work zone crashes. Additionally, the research identified several work zone geometric and traffic control device considerations which may improve large truck safety in work zones, including lane and shoulder widths, and signage. The research also determined that a number of knowledge gaps still exist as related to the underlying causes or contributory factors related to large truck crashes in work zones, such as exposure, driver behavior, and work zone design. Finally, the research proposes a number of potential countermeasures to improve large truck safety in work zones.
Download or read book Highway Construction Zone Safety written by United States. General Accounting Office and published by . This book was released on 1977 with total page 44 pages. Available in PDF, EPUB and Kindle. Book excerpt: Oversight of the Federal Highway Administration in providing sufficient leadership in emphasizing safety in construction zones.
Download or read book Design of Construction Work Zones on High speed Highways written by Kevin M. Mahoney and published by Transportation Research Board. This book was released on 2007 with total page 77 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Guidelines for Design and Operation of Nighttime Traffic Control for Highway Maintenance and Construction written by James E. Bryden and published by Transportation Research Board. This book was released on 2002 with total page 131 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Travel Time Reliability Based Work Zone Scheduling written by and published by . This book was released on 2014 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: The continued deterioration of highway infrastructure in the US has resulted in increased number, duration, and scope of work zone projects. Transportation agencies are facing great challenges to schedule and manage work zones efficiently and economically. To improve the decision making process, in the past decades, several models have been developed to determine an optimal single work zone project schedule and operational strategy. Existing work zone scheduling models usually assume fixed average traffic impact given a designed work zone schedule. Recently, the incorporation of travel time reliability (TTR) in evaluating highway facility and traffic improvement projects has drawn increased attention. In comparison to traditional average travel time based methods, it considers the full distribution of travel time under a large number of traffic scenarios such as demand fluctuations, incidents, weather, etc. rather than an average value thus provide more comprehensive insights on the potential traffic impact of a highway improvement plan and new transportation facilities. However, the existing Highway Capacity Manual (HCM) toolbox of evaluating travel time reliability is complex and inefficient to be integrated into the optimization framework of work zone scheduling problem. In this study, we develop simplified methods that identify and model the work zone impact on travel time and travel time reliability to provide evaluation input for the work zone scheduling problem. Combined with the work zone cost such as maintenance cost, the user cost, and additional accident cost, a new work zone schedule model is proposed that incorporates travel time reliability measures. A genetic algorithm is used to solve this combinational optimization problem. Numeric examples are carried out to demonstrate the applicability and effectiveness of the developed model. Sensitivity analysis about maximum project duration and value of reliability is also conducted. The results indicate that this TTR based work zone scheduling is effective and promising.
Download or read book Work Zone Traffic Management Synthesis written by Errol C. Noel and published by . This book was released on 1989 with total page 60 pages. Available in PDF, EPUB and Kindle. Book excerpt: This report is a synthesis of research findings and current practices in the design, selection and application of rumble strips at work zones. The information is based on a review of research reports and work zone manuals from a selection of state and local highway agencies, discussions with highway officials, and field observations of selected highway construction projects. The report presents an assessment of the state-of-the-practice and makes recommendations for further research and future revisions of the Manual on Uniform Traffic Control Devices.
Download or read book Multi Objective Optimization for Large Scale Highway Construction Projects written by and published by . This book was released on 2005 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Roadside Design Guide written by American Association of State Highway and Transportation Officials. Task Force for Roadside Safety and published by . This book was released on 1989 with total page 560 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Improvements and New Concepts for Traffic Control in Work Zones Volume 2 Implementation of Work Zone Traffic Control Final Report written by Ismael F. Garza and published by . This book was released on 1985 with total page 28 pages. Available in PDF, EPUB and Kindle. Book excerpt:
