Evaluation Of Work Zone Crashes In California

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Evaluation of Work Zone Crashes in California

Author : Dheeraj Varma Lakamraju
Publisher :
ISBN 13 :
Total Pages : 96 pages
Book Rating : 4.:/5 (12 download)

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Book Synopsis Evaluation of Work Zone Crashes in California by : Dheeraj Varma Lakamraju

Download or read book Evaluation of Work Zone Crashes in California written by Dheeraj Varma Lakamraju and published by . This book was released on 2017 with total page 96 pages. Available in PDF, EPUB and Kindle. Book excerpt: Work zone crashes have been a major concern of safety for many government agencies and travelling public. According to Federal Highway Administration(FHWA) Fact & Statistics, there is need for maintenance, rehabilitation and advancement of existing road networks, which in turn lead to setup of large number of work zones throughout US which eventually impacts the regular traffic flow and safety. The main objective of this project was to find work zone crash characteristics and risk factors that affect the crash severity. For that purpose data relating to work zone crashes that occurred on all roadways in the state of California for the years 2011 to 2016 were obtained from Statewide Integrated Traffic Records System (SWITRS). A total of 12 variables with 45136 crashes were used to develop a crash severity model. The first step of the study was gathering literature on previous studies relating to work zone crash analysis. In the second step, the work zone crash data for each variable was analyzed based on crash severity and crash patterns were determined. In the third step, each variable was statistically analyzed to determine significant differences between the variable and the dependent variable using Pearson chi-square statistical test. A total of 10 variables out of 12 variables were found to have a significant relationship between the dependent variable. In the fourth step, a binary logistic regression model was used to determine significant predictors of fatal crashes. In this study, the independent variables such as location of crash, violation category, crash type, motor vehicle involved with, lighting condition, alcohol involved, and driver???s gender were found to be significant predictors of fatal crashes at work zones in the state of California for years 2011-2016.

Evaluation of Injury and Fatality Reduction in Work Zone Traffic Collisions Due to Incremental Speed Reductions

Author : Andrew Tracey Malone
Publisher :
ISBN 13 : 9781303443282
Total Pages : pages
Book Rating : 4.4/5 (432 download)

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Book Synopsis Evaluation of Injury and Fatality Reduction in Work Zone Traffic Collisions Due to Incremental Speed Reductions by : Andrew Tracey Malone

Download or read book Evaluation of Injury and Fatality Reduction in Work Zone Traffic Collisions Due to Incremental Speed Reductions written by Andrew Tracey Malone and published by . This book was released on 2013 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: The main purpose of this study is to scientifically assess the usefulness and cost effectiveness of Construction Zone Enhanced Enforcement Program (COZEEP) and Maintenance Zone Enhanced Enforcement Program (MAZEEP). These operations are a collaboration between California Department of Transportation (Caltrans) and California Highway Patrol (CHP). Vehicle collisions that occur near or in highway work zone areas can be expensive, cause injuries, and dramatically increase danger to road workers and the traveling public. This research focuses mainly on the injury cost benefit of using COZEEP/MAZEEP along with the severity and number reduction of accidents that occur in the proximity of work zones. The basis for this study is provided by comprehensive traffic collision reports in construction and maintenance zones that are collected throughout the Californian districts. From the gathered traffic collision reports, 100 collisions with direct involvement to the work site are selected for reconstruction using simulation software (PC-Crash). The selected collisions for analysis are chosen because there is either intrusion into the work zone or the collision involves construction property and results in injury. The analysis process consists of reconstructing the initial accident in PC-Crash. Then two conditions are placed on the simulated accident. First a 7 mph initial speed reduction is placed onto the simulation. The second condition is a 5 mph initial speed reduction placed onto the vehicles involved in the collision. Each outcome is then marked as "no change", "severity reduction", or "prevented".

Work Zone Accident Exposure Analysis

Author : Warren E. Hughes
Publisher :
ISBN 13 :
Total Pages : 112 pages
Book Rating : 4.:/5 (1 download)

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Book Synopsis Work Zone Accident Exposure Analysis by : Warren E. Hughes

Download or read book Work Zone Accident Exposure Analysis written by Warren E. Hughes and published by . This book was released on 2002 with total page 112 pages. Available in PDF, EPUB and Kindle. Book excerpt: This report presents the results of a study of reported crashes that occurred in selected work zones from four participating States: California, Maryland, Minnesota, and Washington. Candidate construction projects were identified by the State Transportation Agencies. Data on the location of the project, the start and end dates, the type of project, the type of highway, and other factors were compiled for each project. In addition, data on the work zone was also gathered. Crashes reported when the work zone was in effect and for the corresponding period before the construction project were identified and crash data were obtained. Analyses were undertaken to determine differences in crash rates during construction compared to before construction. The relative increase in rates was on the order of 25 to 50 percent for many of the projects and as much as 100 percent for some of the projects. In addition, an assessment of data elements for work zones and work zone crashes was conducted. Recommendations on a standardized definition for work zones and work zone crashes are proposed.

California's Annual Evaluation Report of Highway Safety Program Implementation for the ... Federal Fiscal Year

Author : California. Office of Traffic Safety
Publisher :
ISBN 13 :
Total Pages : 582 pages
Book Rating : 4.:/5 (4 download)

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Book Synopsis California's Annual Evaluation Report of Highway Safety Program Implementation for the ... Federal Fiscal Year by : California. Office of Traffic Safety

Download or read book California's Annual Evaluation Report of Highway Safety Program Implementation for the ... Federal Fiscal Year written by California. Office of Traffic Safety and published by . This book was released on 1985 with total page 582 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Evaluation of Nighttime Construction Accidents in Southern California

Author : Lance Heira Higa
Publisher :
ISBN 13 : 9781267204295
Total Pages : 368 pages
Book Rating : 4.2/5 (42 download)

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Book Synopsis Evaluation of Nighttime Construction Accidents in Southern California by : Lance Heira Higa

Download or read book Evaluation of Nighttime Construction Accidents in Southern California written by Lance Heira Higa and published by . This book was released on 2012 with total page 368 pages. Available in PDF, EPUB and Kindle. Book excerpt: Abstract: Accidents during nighttime construction are major concerns in urban areas. More data for nighttime work zone safety studies are needed to support the decision making process of construction operations. The main objective of this paper is to evaluate what type of accidents most frequently occur. This study focuses exclusively on nighttime construction zone accidents which occurred in Riverside and San Bernardino counties from 2006 to 2009. The data is analyzed using ANOVA and Regression analysis. The findings of the study indicate a driver is likely to be involved in a sideswipe, rear end, hit other object or overturn accident. The leading cause for the accident is speeding, making an illegal turn, or improper driving with the movement of the driver prior to the accident being traveling straight, stopped or marking a right turn. Nighttime construction accidents can be reduced with a better understanding and knowledge of how they occur.

A Biomechanical Analysis and Evaluation of Highly Mobile Longitudinal Work Zone Barriers

Author : Mary Catherine Arico
Publisher :
ISBN 13 :
Total Pages : 582 pages
Book Rating : 4.:/5 (83 download)

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Book Synopsis A Biomechanical Analysis and Evaluation of Highly Mobile Longitudinal Work Zone Barriers by : Mary Catherine Arico

Download or read book A Biomechanical Analysis and Evaluation of Highly Mobile Longitudinal Work Zone Barriers written by Mary Catherine Arico and published by . This book was released on 2009 with total page 582 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Statistical and Econometric Methods for Transportation Data Analysis

Author : Simon Washington
Publisher : CRC Press
ISBN 13 : 0429520751
Total Pages : 496 pages
Book Rating : 4.4/5 (295 download)

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Book Synopsis Statistical and Econometric Methods for Transportation Data Analysis by : Simon Washington

Download or read book Statistical and Econometric Methods for Transportation Data Analysis written by Simon Washington and published by CRC Press. This book was released on 2020-01-30 with total page 496 pages. Available in PDF, EPUB and Kindle. Book excerpt: The book's website (with databases and other support materials) can be accessed here. Praise for the Second Edition: The second edition introduces an especially broad set of statistical methods ... As a lecturer in both transportation and marketing research, I find this book an excellent textbook for advanced undergraduate, Master’s and Ph.D. students, covering topics from simple descriptive statistics to complex Bayesian models. ... It is one of the few books that cover an extensive set of statistical methods needed for data analysis in transportation. The book offers a wealth of examples from the transportation field. —The American Statistician Statistical and Econometric Methods for Transportation Data Analysis, Third Edition offers an expansion over the first and second editions in response to the recent methodological advancements in the fields of econometrics and statistics and to provide an increasing range of examples and corresponding data sets. It describes and illustrates some of the statistical and econometric tools commonly used in transportation data analysis. It provides a wide breadth of examples and case studies, covering applications in various aspects of transportation planning, engineering, safety, and economics. Ample analytical rigor is provided in each chapter so that fundamental concepts and principles are clear and numerous references are provided for those seeking additional technical details and applications. New to the Third Edition Updated references and improved examples throughout. New sections on random parameters linear regression and ordered probability models including the hierarchical ordered probit model. A new section on random parameters models with heterogeneity in the means and variances of parameter estimates. Multiple new sections on correlated random parameters and correlated grouped random parameters in probit, logit and hazard-based models. A new section discussing the practical aspects of random parameters model estimation. A new chapter on Latent Class Models. A new chapter on Bivariate and Multivariate Dependent Variable Models. Statistical and Econometric Methods for Transportation Data Analysis, Third Edition can serve as a textbook for advanced undergraduate, Masters, and Ph.D. students in transportation-related disciplines including engineering, economics, urban and regional planning, and sociology. The book also serves as a technical reference for researchers and practitioners wishing to examine and understand a broad range of statistical and econometric tools required to study transportation problems.

California's Annual Evaluation Report of Traffic Safety Program Implementation for the ... Federal Fiscal Year

Author : California. Office of Traffic Safety
Publisher :
ISBN 13 :
Total Pages : 196 pages
Book Rating : 4.:/5 (5 download)

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Book Synopsis California's Annual Evaluation Report of Traffic Safety Program Implementation for the ... Federal Fiscal Year by : California. Office of Traffic Safety

Download or read book California's Annual Evaluation Report of Traffic Safety Program Implementation for the ... Federal Fiscal Year written by California. Office of Traffic Safety and published by . This book was released on 1993 with total page 196 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Scientific Evaluation of the ArmorGuard Mobile Barrier System

Author : Bahram Ravani
Publisher :
ISBN 13 :
Total Pages : 96 pages
Book Rating : 4.:/5 (1 download)

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Book Synopsis Scientific Evaluation of the ArmorGuard Mobile Barrier System by : Bahram Ravani

Download or read book Scientific Evaluation of the ArmorGuard Mobile Barrier System written by Bahram Ravani and published by . This book was released on 2011 with total page 96 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Work Zone Crash Analysis and Modeling to Identify Factors Associated with Crash Severity and Frequency

Author : Ishani Madurangi Dias
Publisher :
ISBN 13 :
Total Pages : 123 pages
Book Rating : 4.:/5 (934 download)

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Book Synopsis Work Zone Crash Analysis and Modeling to Identify Factors Associated with Crash Severity and Frequency by : Ishani Madurangi Dias

Download or read book Work Zone Crash Analysis and Modeling to Identify Factors Associated with Crash Severity and Frequency written by Ishani Madurangi Dias and published by . This book was released on 2015 with total page 123 pages. Available in PDF, EPUB and Kindle. Book excerpt: "The safe and efficient flow of traffic through work zones must be established by improving work zone conditions. Therefore, identifying the factors associated with the severity and the frequency of work zone crashes is important. According to current statistics from the Federal Highway Administration, 2,372 fatalities were associated with motor vehicle traffic crashes in work zones in the United States during the four years from 2010 to 2013. From 2002 to 2014, an average of 1,612 work zone crashes occurred in Kansas each year, making it a serious concern in Kansas. The objectives of this study were to analyze work zone crash characteristics, identify the factors associated with crash severity and frequency, and to identify recommendations to improve work zone safety. Work zone crashes in Kansas from 2010 to 2013 were used to develop crash severity models. Ordered probit regression was used to model the crash severities for daytime, nighttime, multi-vehicle and single-vehicle work zone crashes and for work zones crashes in general. Based on severity models, drivers from 26 to 65 years of age were associated with high crash severities during daytime work zone crashes and driver age was not found significant in nighttime work zone crashes. The use of safety equipment was related to reduced crash severities regardless of the time of the crash. Negative binomial regression was used to model the work zone crash frequency using work zones functioned in Kansas in 2013 and 2014. According to results, increased average daily traffic (AADT) was related to higher number of work zone crashes and work zones in operation at nighttime were related to a reduced number of work zone crashes. Findings of this study were used to provide general countermeasure ideas for improving safety of work zones" (page ii).

Crash Characteristics at Work Zones

Author : Nicholas J. Garber
Publisher :
ISBN 13 :
Total Pages : 44 pages
Book Rating : 4.3/5 (91 download)

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Book Synopsis Crash Characteristics at Work Zones by : Nicholas J. Garber

Download or read book Crash Characteristics at Work Zones written by Nicholas J. Garber and published by . This book was released on 2002 with total page 44 pages. Available in PDF, EPUB and Kindle. Book excerpt: Work zones tend to cause hazardous conditions for drivers and construction workers since they generate conflicts between construction activities and traffic. A clear understanding of the characteristics of work zone crashes will enhance the selection of the appropriate measures that can minimize the negative impacts of work zones. This study investigated the characteristics of work zone crashes that occurred in Virginia between 1996 and 1999. The information on each crash was obtained from the police crash record. The location of each crash was categorized as being in one of the five areas of a typical work zone: advance warning area, transition area, longitudinal buffer area, activity area, and termination area. An analysis of the percentage distributions was then carried out with respect to area in work zone, severity, type of collision, and type of highway. The proportionality test was used to determine significant differences at the 5 percent significance level. Selected crash characteristics, such as the proportions of single- and multi-vehicle crashes, were compared for work zone and non-work zone crashes. The results indicated that the activity area was the predominant location for work zone crashes regardless of highway type and that rear-end crashes were the predominant type of crash. The results also indicated that the proportion of sideswipe same direction crashes in the transition area was significantly higher than in the advance warning area and that work zone crashes involved a higher proportion of multi-vehicle crashes and fatal crashes than did non-work zone crashes.

Final Report: Accident prevention. 2 pts

Author : California. Governor's Automobile Accident Study Commission
Publisher :
ISBN 13 :
Total Pages : 374 pages
Book Rating : 4.F/5 ( download)

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Book Synopsis Final Report: Accident prevention. 2 pts by : California. Governor's Automobile Accident Study Commission

Download or read book Final Report: Accident prevention. 2 pts written by California. Governor's Automobile Accident Study Commission and published by . This book was released on 1970 with total page 374 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Integrated Work Zone Safety Management System and Analysis Tools

Author : Jian John Lu
Publisher :
ISBN 13 :
Total Pages : 181 pages
Book Rating : 4.:/5 (275 download)

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Book Synopsis Integrated Work Zone Safety Management System and Analysis Tools by : Jian John Lu

Download or read book Integrated Work Zone Safety Management System and Analysis Tools written by Jian John Lu and published by . This book was released on 2008 with total page 181 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Strategies for Work Zone Transportation Management Plans

Author : Leverson Boodlal
Publisher :
ISBN 13 : 9780309481786
Total Pages : 0 pages
Book Rating : 4.4/5 (817 download)

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Book Synopsis Strategies for Work Zone Transportation Management Plans by : Leverson Boodlal

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.

Varied Applications of Work Zone Safety Analysis Through the Investigation of Crash Data, Design, and Field Studies

Author : Erica Lee Swansen
Publisher :
ISBN 13 :
Total Pages : 137 pages
Book Rating : 4.:/5 (82 download)

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Book Synopsis Varied Applications of Work Zone Safety Analysis Through the Investigation of Crash Data, Design, and Field Studies by : Erica Lee Swansen

Download or read book Varied Applications of Work Zone Safety Analysis Through the Investigation of Crash Data, Design, and Field Studies written by Erica Lee Swansen and published by . This book was released on 2012 with total page 137 pages. Available in PDF, EPUB and Kindle. Book excerpt: Work zone crashes and fatalities have been decreasing since 1994. Yet, according to Fatality Analysis Reporting System, 667 people were killed in highway work zone crashes in 2009. As the United States' infrastructure ages and new roads and highways are constructed less frequently, the need for repairs and alterations to the nation's roadways is continually increasing. This growth ensures that work zones will be a vital piece of design focus in the near future. In order to continue the decreasing trend in work zone crashes, and reduce the still significant number of work zone fatalities, work zones need to continually be examined to identify opportunities for improved safety. This research explored the relationship between work zone related crashes and work zone design and setup. More specifically, existing literature and current standards, compiled with crash report form data in the UMass Safety Data Warehouse and field observations in Massachusetts were integrated to determine the causes and remedies for work zone related crashes. The research examined three critical areas: 1) causation of work zone related crashes in contrast to non-work zone related crashes along with variations of citations as a result of work zone crashes; 2) variations of the work zone definition and the impact on work zone involvement; and 3) analysis of conflict and event studies for small scale work zones to develop a methodology using surrogate measures to identify potential countermeasures leading to improved work zone safety. The results are expected to advance the current state of knowledge with regards to work zone design and setup, resulting in recommended actions for improved work zone analysis and design strategies.

Traffic Safety Evaluation of Nighttime and Daytime Work Zones

Author : Gerald L. Ullman
Publisher :
ISBN 13 :
Total Pages : 92 pages
Book Rating : 4.X/5 (3 download)

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Book Synopsis Traffic Safety Evaluation of Nighttime and Daytime Work Zones by : Gerald L. Ullman

Download or read book Traffic Safety Evaluation of Nighttime and Daytime Work Zones written by Gerald L. Ullman and published by . This book was released on 2008 with total page 92 pages. Available in PDF, EPUB and Kindle. Book excerpt: TRB¿s National Cooperative Highway Research Program (NCHRP) Report 627: Traffic Safety Evaluation of Nighttime and Daytime Work Zones explores the crash rates for nighttime and daytime work zones and examines management practices that promote safety and mobility in work zones. The report also highlights work-zone crash reporting suggestions designed to help improve the data collected on work zone crashes.

Characteristics and Risk Factors Associated with Work Zone Crashes

Author : Sreekanth Reddy Akepati
Publisher :
ISBN 13 :
Total Pages : pages
Book Rating : 4.:/5 (692 download)

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Book Synopsis Characteristics and Risk Factors Associated with Work Zone Crashes by : Sreekanth Reddy Akepati

Download or read book Characteristics and Risk Factors Associated with Work Zone Crashes written by Sreekanth Reddy Akepati and published by . This book was released on 2010 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: In the United States, approximately 1,100 people die and 40,000 people are injured annually as a result of motor vehicle crashes in work zones. These numbers may be a result of interruption to regular traffic flow caused by closed traffic lanes, poor traffic management within work zones, general misunderstanding of problems associated with work zones, or improper usage of traffic control devices. In regard to safety of work zones, this study was conducted to identify characteristics and risk factors associated with work zone crashes in Iowa, Kansas, Missouri, Nebraska and Wisconsin, states currently included in the Smart Work Zone Deployment Initiative (SWZDI) region. The study was conducted in two stages. In the first stage, characteristics and contributory causes related to work zone crashes such as environmental conditions, vehicles, crashes, drivers, and roadways were analyzed for the five states for the period 2002-2006. An analysis of percentage-wise distributions was carried out for each variable based on different conditions. Results showed that most of the work zone crashes occurred under clear environmental conditions as during daylight, no adverse weather, etc. Multiple-vehicle crashes were more predominant than single-vehicle crashes in work zone crashes. Primary driver-contributing factors of work zone crashes were inattentive driving, following too close for conditions, failure to yield right of way, driving too fast for conditions, and exceeding posted speed limits within work zones. A test of independency was performed to find the relation between crash severity and other work zone variables for the combined states. In the second stage, a statistical model was developed to identify risk factors associated with work zone crashes. In order to predict injury severity of work zone crashes, an ordered probit model analysis was carried out using the Iowa work zone crash database. According to findings of the severity model, work zone crashes involving trucks, light duty vehicles, vehicles following too close, sideswipe collisions of same-direction vehicles, nondeployment of airbags, and driver age are some of the contributing factors towards more severe crashes.