Evaluation Of Dynamic Speed Feedback Signs On Curves

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Evaluation of Dynamic Speed Display Signs (DSDS)

Author : Elisabeth R. Rose
Publisher :
ISBN 13 :
Total Pages : 110 pages
Book Rating : 4.3/5 (555 download)

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Book Synopsis Evaluation of Dynamic Speed Display Signs (DSDS) by : Elisabeth R. Rose

Download or read book Evaluation of Dynamic Speed Display Signs (DSDS) written by Elisabeth R. Rose and published by . This book was released on 2003 with total page 110 pages. Available in PDF, EPUB and Kindle. Book excerpt: Dynamic speed display signs (DSDS), devices that detect and display a vehicle's current speed back to the driver, have been shown to have a significant speed-reducing effect in temporary applications such as work zones or neighborhood speed watch programs. In this report, researchers examined the effectiveness of DSDS installed permanently in several locations that were experiencing speed-related problems. Seven sites were evaluated, including a school speed zone, two transition speed zones in advance of a school speed zone, two sharp horizontal curves and two approaches to signalized intersections on high-speed roadways. Data were collected before the DSDS were installed, about one week after installation to determine initial effects of the signs upon vehicle speeds, and again about four months after installation to determine how well the initial speed reductions were maintained. Researchers analyzed average speeds, 85th percentile speeds, percent of the sample exceeding the speed limit and standard deviations of the samples. Also, least square regression analyses between the speed of a vehicle upstream of the DSDS and that vehicle's speed measured again at the DSDS were performed to determine whether the sign affected higher speed vehicles more than lower speed vehicles. Overall, average speeds were reduced by 9 miles per hour at the school speed zone. Elsewhere, the effect of the DSDS was less dramatic, with average speeds reduced by 5 mph or less, depending on the location tested. As expected, the influence of a DSDS was found to differ depending on how fast a motorist approached the DSDS. Those motorists traveling faster than the posted speed did appear to reduce their speed more significantly in response to the DSDS than did motorists traveling at or below the posted speed limit. The results of this project suggest that DSDS can be effective at reducing speeds in permanent applications if appropriate site conditions apply.

Highway Safety Research Agenda: Infrastructure and Operations

Author : Charles V. Zegeer
Publisher : Transportation Research Board
ISBN 13 : 0309283523
Total Pages : 103 pages
Book Rating : 4.3/5 (92 download)

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Book Synopsis Highway Safety Research Agenda: Infrastructure and Operations by : Charles V. Zegeer

Download or read book Highway Safety Research Agenda: Infrastructure and Operations written by Charles V. Zegeer and published by Transportation Research Board. This book was released on 2013 with total page 103 pages. Available in PDF, EPUB and Kindle. Book excerpt: "TRB's National Cooperative Highway Research Program (NCHRP) 756: Highway Safety Research Agenda: Infrastructure and Operations develops a proposed agenda of prioritized safety research needs in the area of highway infrastructure and operations. The report provides options to the U.S. transportation community on how to direct research to the areas where it can provide the most benefit. The agenda is based on a prioritization methodology developed by the research team which can be applied on a recurring basis to update the agenda over time. Both the agenda and the methodology documented in this report will assist government officials, private sector employees, and academics with managing highway safety research. In addition to the report, 16 unpublished appendices (Appendices A-O and R) have been made available electronically."--Publisher description.

Economic Sanctions in Criminal Justice

Author : R. Barry Ruback
Publisher : Oxford University Press
ISBN 13 : 0190682582
Total Pages : 241 pages
Book Rating : 4.1/5 (96 download)

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Book Synopsis Economic Sanctions in Criminal Justice by : R. Barry Ruback

Download or read book Economic Sanctions in Criminal Justice written by R. Barry Ruback and published by Oxford University Press. This book was released on 2021 with total page 241 pages. Available in PDF, EPUB and Kindle. Book excerpt: "Justice is expensive. So is injustice. These kinds of judgments are usually made in terms of money, and an economic focus makes sense in the context of criminal law and procedure, since money has long played a role in how society deals with unlawful behavior. These economic sanctions, the court-imposed financial obligations that follow a criminal conviction, are useful because they apply a metric that is understood by everyone. The notion of using money as a means of resolving criminal and civil problems goes back almost four thousand years, to the Code of Hammurabi (Van Ness, 1990), and there are several Biblical injunctions regarding payment after crimes. In the Middle Ages, victims were entitled to compensation for injuries (adjusted for their rank in society), and by the twelfth century, the king was entitled to a fee for administering the system (Klein, 1997)"--

Highway Safety Research Agenda

Author : Charles V. Zegeer
Publisher :
ISBN 13 : 9780309283526
Total Pages : 110 pages
Book Rating : 4.2/5 (835 download)

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Book Synopsis Highway Safety Research Agenda by : Charles V. Zegeer

Download or read book Highway Safety Research Agenda written by Charles V. Zegeer and published by . This book was released on 2013 with total page 110 pages. Available in PDF, EPUB and Kindle. Book excerpt: "TRB's National Cooperative Highway Research Program (NCHRP) 756: Highway Safety Research Agenda: Infrastructure and Operations develops a proposed agenda of prioritized safety research needs in the area of highway infrastructure and operations. The report provides options to the U.S. transportation community on how to direct research to the areas where it can provide the most benefit. The agenda is based on a prioritization methodology developed by the research team which can be applied on a recurring basis to update the agenda over time. Both the agenda and the methodology documented in this report will assist government officials, private sector employees, and academics with managing highway safety research. In addition to the report, 16 unpublished appendices (Appendices A-O and R) have been made available electronically."--Publisher description.

Advances in Human Aspects of Transportation: Part II

Author : Neville Stanton
Publisher : AHFE International (USA)
ISBN 13 : 1495120988
Total Pages : 557 pages
Book Rating : 4.4/5 (951 download)

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Book Synopsis Advances in Human Aspects of Transportation: Part II by : Neville Stanton

Download or read book Advances in Human Aspects of Transportation: Part II written by Neville Stanton and published by AHFE International (USA). This book was released on 2021-07-19 with total page 557 pages. Available in PDF, EPUB and Kindle. Book excerpt: Human Factors and Ergonomics have made a considerable contribution to the research, design, development, operation and analysis of transportation systems which includes road and rail vehicles and their complementary infrastructure, aviation and maritime transportation. This book presents recent advances in the Human Factors aspects of Transportation. These advances include accident analysis, automation of vehicles, comfort, distraction of drivers (understanding of distraction and how to avoid it), environmental concerns, in-vehicle systems design, intelligent transport systems, methodological developments, new systems and technology, observational and case studies, safety, situation awareness, skill development and training, warnings and workload. This book brings together the most recent human factors work in the transportation domain, including empirical research, human performance and other types of modeling, analysis, and development. The issues facing engineers, scientists, and other practitioners of human factors in transportation research are becoming more challenging and more critical. The common theme across these sections is that they deal with the intersection of the human and the system. Moreover, many of the chapter topics cross section boundaries, for instance by focusing on function allocation in NextGen or on the safety benefits of a tower controller tool. This is in keeping with the systemic nature of the problems facing human factors experts in rail and road, aviation and maritime research– it is becoming increasingly important to view problems not as isolated issues that can be extracted from the system environment, but as embedded issues that can only be understood as a part of an overall system.

MTC ... Annual Report

Author : Midwest Transportation Consortium
Publisher :
ISBN 13 :
Total Pages : 44 pages
Book Rating : 4.:/5 (318 download)

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Book Synopsis MTC ... Annual Report by : Midwest Transportation Consortium

Download or read book MTC ... Annual Report written by Midwest Transportation Consortium and published by . This book was released on 2010 with total page 44 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Annual Report of Iowa Highway Research Board Research and Development Activities for the Fiscal Year Ending ...

Author : Iowa. Highway Research Board
Publisher :
ISBN 13 :
Total Pages : 106 pages
Book Rating : 4.:/5 (318 download)

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Book Synopsis Annual Report of Iowa Highway Research Board Research and Development Activities for the Fiscal Year Ending ... by : Iowa. Highway Research Board

Download or read book Annual Report of Iowa Highway Research Board Research and Development Activities for the Fiscal Year Ending ... written by Iowa. Highway Research Board and published by . This book was released on 2008 with total page 106 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Annual Report

Author : Iowa. Department of Transportation. Bureau of Research and Technology
Publisher :
ISBN 13 :
Total Pages : 164 pages
Book Rating : 4.:/5 (318 download)

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Book Synopsis Annual Report by : Iowa. Department of Transportation. Bureau of Research and Technology

Download or read book Annual Report written by Iowa. Department of Transportation. Bureau of Research and Technology and published by . This book was released on 2008 with total page 164 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Integrating Traffic Signal Performance Measures Into Agency Business Processes

Author : Christopher Day
Publisher :
ISBN 13 : 9781622603763
Total Pages : pages
Book Rating : 4.6/5 (37 download)

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Book Synopsis Integrating Traffic Signal Performance Measures Into Agency Business Processes by : Christopher Day

Download or read book Integrating Traffic Signal Performance Measures Into Agency Business Processes written by Christopher Day and published by . This book was released on 2015-12-31 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: This report discusses uses of and requirements for performance measures in traffic signal systems facilitated by high-resolution controller event data. Uses of external travel time measurements are also discussed. The discussion is led by a high-level synthesis of the systems engineering concepts for traffic signal control, considering technical and nontechnical aspects of the problem. This is followed by a presentation of the requirements for implementing data collection and processing of the data into signal performance measures. The remaining portion of the report uses an example-oriented approach to show a variety of uses of performance measures for communication and detector system health, quality of local control (including capacity allocation, safety, pedestrian performance, preemption, and advanced control analysis), and quality of progression (including evaluation and optimization).

Analysis & Summary of Accident Investigations, 1973-1976

Author : United States. Bureau of Motor Carrier Safety
Publisher :
ISBN 13 :
Total Pages : 180 pages
Book Rating : 4.:/5 (31 download)

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Book Synopsis Analysis & Summary of Accident Investigations, 1973-1976 by : United States. Bureau of Motor Carrier Safety

Download or read book Analysis & Summary of Accident Investigations, 1973-1976 written by United States. Bureau of Motor Carrier Safety and published by . This book was released on 1977 with total page 180 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Introduction to Aircraft Flight Mechanics

Author : Thomas R. Yechout
Publisher : AIAA
ISBN 13 : 9781600860782
Total Pages : 666 pages
Book Rating : 4.8/5 (67 download)

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Book Synopsis Introduction to Aircraft Flight Mechanics by : Thomas R. Yechout

Download or read book Introduction to Aircraft Flight Mechanics written by Thomas R. Yechout and published by AIAA. This book was released on 2003 with total page 666 pages. Available in PDF, EPUB and Kindle. Book excerpt: Based on a 15-year successful approach to teaching aircraft flight mechanics at the US Air Force Academy, this text explains the concepts and derivations of equations for aircraft flight mechanics. It covers aircraft performance, static stability, aircraft dynamics stability and feedback control.

Feedback Systems

Author : Karl Johan Åström
Publisher : Princeton University Press
ISBN 13 : 069121347X
Total Pages : pages
Book Rating : 4.6/5 (912 download)

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Book Synopsis Feedback Systems by : Karl Johan Åström

Download or read book Feedback Systems written by Karl Johan Åström and published by Princeton University Press. This book was released on 2021-02-02 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: The essential introduction to the principles and applications of feedback systems—now fully revised and expanded This textbook covers the mathematics needed to model, analyze, and design feedback systems. Now more user-friendly than ever, this revised and expanded edition of Feedback Systems is a one-volume resource for students and researchers in mathematics and engineering. It has applications across a range of disciplines that utilize feedback in physical, biological, information, and economic systems. Karl Åström and Richard Murray use techniques from physics, computer science, and operations research to introduce control-oriented modeling. They begin with state space tools for analysis and design, including stability of solutions, Lyapunov functions, reachability, state feedback observability, and estimators. The matrix exponential plays a central role in the analysis of linear control systems, allowing a concise development of many of the key concepts for this class of models. Åström and Murray then develop and explain tools in the frequency domain, including transfer functions, Nyquist analysis, PID control, frequency domain design, and robustness. Features a new chapter on design principles and tools, illustrating the types of problems that can be solved using feedback Includes a new chapter on fundamental limits and new material on the Routh-Hurwitz criterion and root locus plots Provides exercises at the end of every chapter Comes with an electronic solutions manual An ideal textbook for undergraduate and graduate students Indispensable for researchers seeking a self-contained resource on control theory

Managing Speed

Author :
Publisher : Transportation Research Board
ISBN 13 : 9780309065023
Total Pages : 444 pages
Book Rating : 4.0/5 (65 download)

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Book Synopsis Managing Speed by :

Download or read book Managing Speed written by and published by Transportation Research Board. This book was released on 1998 with total page 444 pages. Available in PDF, EPUB and Kindle. Book excerpt: TRB Special Report 254 - Managing Speed: Review of Current Practices for Setting and Enforcing Speed Limits reviews practices for setting and enforcing speed limits on all types of roads and provides guidance to state and local governments on appropriate methods of setting speed limits and related enforcement strategies. Following an executive summary, the report is presented in six chapters and five appendices.

Guidance for Implementation of the AASHTO Strategic Highway Safety Plan

Author : Forrest M. Council
Publisher : Transportation Research Board National Research
ISBN 13 :
Total Pages : 116 pages
Book Rating : 4.:/5 (1 download)

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Book Synopsis Guidance for Implementation of the AASHTO Strategic Highway Safety Plan by : Forrest M. Council

Download or read book Guidance for Implementation of the AASHTO Strategic Highway Safety Plan written by Forrest M. Council and published by Transportation Research Board National Research. This book was released on 2008 with total page 116 pages. Available in PDF, EPUB and Kindle. Book excerpt: TRB's National Cooperative Highway Research Program (NCHRP) Report 500, Vol. 21: Guidance for Implementation of the AASHTO Strategic Highway Safety Plan: Safety Data and Analysis in Developing Emphasis Area Plans provides guidance on data sources and analysis techniques that may be employed to assist agencies in allocating safety funds.

Public Roads

Author :
Publisher :
ISBN 13 :
Total Pages : 562 pages
Book Rating : 4.:/5 (319 download)

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Book Synopsis Public Roads by :

Download or read book Public Roads written by and published by . This book was released on 1974 with total page 562 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Methods and Practices for Setting Speed Limits

Author : Gerry John Forbes
Publisher :
ISBN 13 : 9781933452654
Total Pages : 107 pages
Book Rating : 4.4/5 (526 download)

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Book Synopsis Methods and Practices for Setting Speed Limits by : Gerry John Forbes

Download or read book Methods and Practices for Setting Speed Limits written by Gerry John Forbes and published by . This book was released on 2012-09-01 with total page 107 pages. Available in PDF, EPUB and Kindle. Book excerpt: "This informational report describes four primary practices and methodologies (engineering approach, expert systems, optimization, and injury minimization) that are used in establishing speed limits. It also reviews the basic legalities of speed limits and presents several case studies for setting speed limits on a variety of roads"--Provided by publisher.

Transportation Decision Making

Author : Kumares C. Sinha
Publisher : John Wiley & Sons
ISBN 13 : 1118169662
Total Pages : 576 pages
Book Rating : 4.1/5 (181 download)

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Book Synopsis Transportation Decision Making by : Kumares C. Sinha

Download or read book Transportation Decision Making written by Kumares C. Sinha and published by John Wiley & Sons. This book was released on 2011-09-09 with total page 576 pages. Available in PDF, EPUB and Kindle. Book excerpt: This pioneering text provides a holistic approach to decisionmaking in transportation project development and programming, whichcan help transportation professionals to optimize their investmentchoices. The authors present a proven set of methodologies forevaluating transportation projects that ensures that all costs andimpacts are taken into consideration. The text's logical organization gets readers started with asolid foundation in basic principles and then progressively buildson that foundation. Topics covered include: Developing performance measures for evaluation, estimatingtravel demand, and costing transportation projects Performing an economic efficiency evaluation that accounts forsuch factors as travel time, safety, and vehicle operatingcosts Evaluating a project's impact on economic development and landuse as well as its impact on society and culture Assessing a project's environmental impact, including airquality, noise, ecology, water resources, and aesthetics Evaluating alternative projects on the basis of multipleperformance criteria Programming transportation investments so that resources can beoptimally allocated to meet facility-specific and system-widegoals Each chapter begins with basic definitions and concepts followedby a methodology for impact assessment. Relevant legislation isdiscussed and available software for performing evaluations ispresented. At the end of each chapter, readers are providedresources for detailed investigation of particular topics. Theseinclude Internet sites and publications of international anddomestic agencies and research institutions. The authors alsoprovide a companion Web site that offers updates, data foranalysis, and case histories of project evaluation and decisionmaking. Given that billions of dollars are spent each year ontransportation systems in the United States alone, and that thereis a need for thorough and rational evaluation and decision makingfor cost-effective system preservation and improvement, this textshould be on the desks of all transportation planners, engineers,and educators. With exercises in every chapter, this text is anideal coursebook for the subject of transportation systems analysisand evaluation.