Characteristics And Contributory Causes Related To Large Truck Crashes

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Characteristics and Contributory Causes Related to Large Truck Crashes

Author : Siddhartha Kotikalapudi
Publisher :
ISBN 13 :
Total Pages : pages
Book Rating : 4.:/5 (86 download)

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Book Synopsis Characteristics and Contributory Causes Related to Large Truck Crashes by : Siddhartha Kotikalapudi

Download or read book Characteristics and Contributory Causes Related to Large Truck Crashes written by Siddhartha Kotikalapudi and published by . This book was released on 2012 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: In order to improve safety of the overall surface transportation system, each of the critical areas needs to be addressed separately with more focused attention. Statistics clearly show that large-truck crashes contribute significantly to an increased percentage of high-severity crashes. It is therefore important for the highway safety community to identify characteristics and contributory causes related to large-truck crashes. During the first phase of this study, fatal crash data from the Fatality Analysis Reporting System (FARS) database were studied to achieve that objective. In this second phase, truck-crashes of all severity levels were analyzed with the intention of understanding characteristics and contributory causes, and identifying factors contributing to increased severity of truck-crashes, which could not be achieved by analyzing fatal crashes alone. Various statistical methodologies such as cross-classification analysis and severity models were developed using Kansas crash data. Various driver-, road-, environment- and vehicle- related characteristics were identified and contributory causes were analyzed. From the cross-classification analysis, severity of truck-crashes was found to be related with variables such as road surface (type, character and condition), accident class, collision type, driver- and environment-related contributory causes, traffic-control type, truck-maneuver, crash location, speed limit, light and weather conditions, time of day, functional class, lane class, and Average Annual Daily Traffic (AADT). Other variables such as age of truck driver, day of the week, gender of truck-driver, pedestrian- and truck-related contributory causes were found to have no relationship with crash severity of large trucks. Furthermore, driver-related contributory causes were found to be more common than any other type of contributory cause for the occurrence of truck-crashes. Failing to give time and attention, being too fast for existing conditions, and failing to yield right of way were the most dominant truck-driver-related contributory causes, among many others. Through the severity modeling, factors such as truck-driver-related contributory cause, accident class, manner of collision, truck-driver under the influence of alcohol, truck maneuver, traffic control device, surface condition, truck-driver being too fast for existing conditions, truck-driver being trapped, damage to the truck, light conditions, etc. were found to be significantly related with increased severity of truck-crashes. Truck-driver being trapped had the highest odds of contributing to a more severe crash with a value of 82.81 followed by the collision resulting in damage to the truck, which had 3.05 times higher odds of increasing the severity of truck-crashes. Truck-driver under the influence of alcohol had 2.66 times higher odds of contributing to a more severe crash. Besides traditional practices like providing adequate traffic signs, ensuring proper lane markings, provision of rumble strips and elevated medians, use of technology to develop and implement intelligent countermeasures were recommended. These include Automated Truck Rollover Warning System to mitigate truck-crashes involving rollovers, Lane Drift Warning Systems (LDWS) to prevent run-off-road collisions, Speed Limiters (SLs) to control the speed of the truck, connecting vehicle technologies like Vehicle-to-Vehicle (V2V) integration system to prevent head-on collisions etc., among many others. Proper development and implementation of these countermeasures in a cost effective manner will help mitigate the number and severity of truck-crashes, thereby improving the overall safety of the transportation system.

Characteristics and Contributory Causes Related to Large Truck Crashes (phase I)

Author : Sunanda Dissanayake
Publisher :
ISBN 13 :
Total Pages : 77 pages
Book Rating : 4.:/5 (77 download)

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Book Synopsis Characteristics and Contributory Causes Related to Large Truck Crashes (phase I) by : Sunanda Dissanayake

Download or read book Characteristics and Contributory Causes Related to Large Truck Crashes (phase I) written by Sunanda Dissanayake and published by . This book was released on 2010 with total page 77 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Characteristics and Contributory Causes Associated with Fatal Large Truck Crashes

Author : Nishitha Naveen Kumar Bezwada
Publisher :
ISBN 13 :
Total Pages : pages
Book Rating : 4.:/5 (692 download)

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Book Synopsis Characteristics and Contributory Causes Associated with Fatal Large Truck Crashes by : Nishitha Naveen Kumar Bezwada

Download or read book Characteristics and Contributory Causes Associated with Fatal Large Truck Crashes written by Nishitha Naveen Kumar Bezwada and published by . This book was released on 2010 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: One-ninth of all traffic fatalities in the United States (U.S.) in the past five years have involved large trucks, although large trucks contributed to only 3% of registered vehicles and 7% of vehicle miles traveled. This crash overrepresentation indicates that truck crashes in general tend to be more severe than other crashes, though they constitute a smaller portion of vehicles on the road. To study this issue, fatal crash data from the Fatality Analysis Reporting System (FARS) was used to analyze characteristics and factors contributing to truck-involved crashes. Driver, vehicle, and crash-related contributory causes were identified, and as an extension, the likelihood of occurrence of these contributory causes in truck-involved crashes (with respect to non-truck crashes) was evaluated using the Bayesian Statistical approach. Likelihood ratios indicated that factors such as stopped or unattended vehicles and improper following have greater probability of occurrence in truck crashes than in non-truck crashes. Also, Multinomial Logistic Regression was used to model the type of fatal crash (truck vs. non-truck) to compare the relative significance of various factors in truck and non-truck crashes. Factors such as cellular phone usage, failure to yield right of way, inattentiveness, and failure to obey traffic rules also have a greater probability in fatal truck crashes. Among several other factors, inadequate warning signs and poor shoulder conditions were also found to have greater predominance in contributing to truck crashes than non-truck crashes. By addressing these factors through the implementation of appropriate remedial measures, the truck safety experience could be improved, which would eventually help in improving overall safety of the transportation system.

Traffic and Geometric Characteristics Affecting the Involvement of Large Trucks in Accidents

Author : Nicholas J. Garber
Publisher :
ISBN 13 :
Total Pages : 76 pages
Book Rating : 4.:/5 (896 download)

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Book Synopsis Traffic and Geometric Characteristics Affecting the Involvement of Large Trucks in Accidents by : Nicholas J. Garber

Download or read book Traffic and Geometric Characteristics Affecting the Involvement of Large Trucks in Accidents written by Nicholas J. Garber and published by . This book was released on 1989 with total page 76 pages. Available in PDF, EPUB and Kindle. Book excerpt: Recent trends indicate that vehicle miles traveled for large trucks is increasing at a higher rate than for other vehicles. The resulting competition between large trucks and other vehicles for highway space can be expected to result in more multi-vehicle collisions involving large trucks. The likelihood of these collisions causing severe injuries to vehicle occupants will also increase with the trend towards the use of smaller automobiles and heavier and larger trucks. In order to develop countermeasures that will alleviate this problem, it is first necessary to identify the characteristics of large-truck accidents and the role of traffic and geometric variables in such accidents ents. The major factors associated with large-truck accidents including the effect of highway facility type and highway geometry are investigated. Changes in large-truck accidents for periods before and after 1982 are evaluated by a comparison of pre- and post-1982 accident involvement rates. Factors that might have affected large-truck travel and accident rates include the Surface Transportation Assistance Act of 1982 (STAA), the improvement of the nation's economy, and deregulation of the trucking industry. The results indicate that fatal crashes involving large trucks have been increasing in contrast to all other vehicles, for which the fatality rates are constant for the same period. Driver-related factors are associated with 75 percent of all accidents involving trucks, and driver error is associated with SO percent of all fatal truck accidents. A significant correlation is also observed between driver error and highway alignment in accidents involving trucks. The risk of a fatality in a multi-vehicle accident involving a truck and another vehicle is found LO be highest on two-way undivided facilities. On divided, limited access facilities, this risk is reduced by 50 percent. An unexpected increase in tractor trailer accident involvement rates for non-STAA primary routes is observed and is attributed to incompatibilities between large-truck characteristics and the non-STAA highway environment. This interim report presents the results of the first part of a study, which also involves the development of models relating accident occurrence with geometric and traffic characteristics. The development of these models is now in progress. These models and the information given in this interim report will facilitate the formulation of countermeasures that will reduce accidents involving large trucks in Virginia.

Characteristics of Large-Truck Accidents as Represenated in Texas Accident Data at HSRI

Author : John A. Green
Publisher :
ISBN 13 :
Total Pages : 68 pages
Book Rating : 4.L/5 (3 download)

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Book Synopsis Characteristics of Large-Truck Accidents as Represenated in Texas Accident Data at HSRI by : John A. Green

Download or read book Characteristics of Large-Truck Accidents as Represenated in Texas Accident Data at HSRI written by John A. Green and published by . This book was released on 1975 with total page 68 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Large-truck Crash Causation Study

Author : Marc Starnes
Publisher :
ISBN 13 :
Total Pages : 60 pages
Book Rating : 4.3/5 (91 download)

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Book Synopsis Large-truck Crash Causation Study by : Marc Starnes

Download or read book Large-truck Crash Causation Study written by Marc Starnes and published by . This book was released on 2006 with total page 60 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Spatial and Temporal Effects of Large Truck-Involved Crash Injury Severities

Author : Jasmine Pahukula
Publisher :
ISBN 13 :
Total Pages : 84 pages
Book Rating : 4.:/5 (91 download)

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Book Synopsis Spatial and Temporal Effects of Large Truck-Involved Crash Injury Severities by : Jasmine Pahukula

Download or read book Spatial and Temporal Effects of Large Truck-Involved Crash Injury Severities written by Jasmine Pahukula and published by . This book was released on 2015 with total page 84 pages. Available in PDF, EPUB and Kindle. Book excerpt: Large truck-involved crashes have a significant impact on both the economy and society. They are associated with high injury severities, high crash costs and contribute to congestion in urban areas. Past studies have investigated the contributing factors of large truck-involved crashes, however a study isolating the spatial and temporal effects is lacking. This thesis aims to bridge that gap as well as provide practical applications to improve safety from a large truck perspective through two new frameworks. This thesis contains two standalone documents, each detailing the spatial and temporal transferability framework, separately. These frameworks provide additional information that can be utilized in the development of planning tools to ultimately improve safety. Random parameters logit models (i.e. mixed logit models) were utilized to help identify the contributing factors of large truck-involved crashes. One advantage of the mixed logit model is that it can account for the unobserved heterogeneity in the model which relaxes the independence of irrelevant alternatives (IIA) property. A series of log likelihood ratio tests were utilized to determine if transferability, spatial or temporal, was warranted. The first document details the spatial transferability framework which is demonstrated through a case study on large truck-involved crashes in urban areas in Oregon and Texas. Strict regulations imposed on the trucking industry limits the variability of heavy-vehicle configurations and enhance the standards for truck drivers (as opposed to passenger vehicle drivers). Encouraging consistency between large trucks is one way to improve safety and has also lead to the investigation of commonalities between large truck-involved crashes in two spatially distributed regions. The results of the log-likelihood ratio tests indicate that spatial transferability is not warranted between Oregon and Texas. Key differences were non-driver or 'uncontrollable' characteristics (e.g. weather, light conditions and time of day) while driver related characteristics (e.g. gender, age and restraint use) had similar impacts. Since the major differences include non-driver characteristics, perhaps a regional model with similar 'uncontrollable' characteristics is warranted. The second document illustrates the temporal transferability framework which is applied to large truck-involved crashes in urban areas in Texas. Traffic patterns, light conditions and driver behavior vary throughout the day and consequently can have a varied impact on large truck-involved crashes. The results of the log likelihood ratio tests indicate that temporal transferability is warranted and the database was divided into five time periods to be analyzed separately. Traffic flow, light conditions, surface conditions, month and percentage of trucks on the road were among the significant differences between the crash factors of each time period. The two proposed transferability frameworks, spatial and temporal, provide new information that can be integrated into safety planning tools and more sharply guide decision-makers. For example, the results of this thesis can help to pinpoint temporal or spatial-related countermeasures. In addition the results of this thesis can help in the allocation of limited resources (i.e. help prioritize projects), minimize economic loss and help decision makers improve safety from a large truck perspective (e.g. modify trucking regulations). Finally, this thesis provides a foundation for future research. As indicated in Chapter 2, a future study to evaluate the feasibility of a regional large truck-involved crash model between neighboring regions and the development of a national crash data reporting standard are potential ideas for future research. Chapter 3 stressed the importance of time of day on large truck-involved crashes which can serve as the basis to study the safety and economic impacts of time of day shifts of truck freight movements to off-peak periods. In summary, this thesis involves original research that expands the literature and provides a new foundation to analyze large truck-involved crashes.

Traffic and Geometric Characteristics Affecting the Involvement of Large Trucks in Accidents: Accident characteristics and fault tree analysis

Download Traffic and Geometric Characteristics Affecting the Involvement of Large Trucks in Accidents: Accident characteristics and fault tree analysis PDF Online Free

Author : Nicholas J. Garber
Publisher :
ISBN 13 :
Total Pages : pages
Book Rating : 4.:/5 (916 download)

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Book Synopsis Traffic and Geometric Characteristics Affecting the Involvement of Large Trucks in Accidents: Accident characteristics and fault tree analysis by : Nicholas J. Garber

Download or read book Traffic and Geometric Characteristics Affecting the Involvement of Large Trucks in Accidents: Accident characteristics and fault tree analysis written by Nicholas J. Garber and published by . This book was released on 1990 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Recent trends indicate that vehicle miles traveled for large trucks is increasing at a higher rate than for other vehicles. The resulting competition between large trucks and other vehicles for highway space can be expected to result in more multi-vehicle collisions involving large trucks. The likelihood of these collisions causing severe injuries to vehicle occupants will also increase with the trend towards the use of smaller automobiles and heavier and larger trucks. In order to develop countermeasures that will alleviate this problem, it is first necessary to identify the characteristics of large-truck accidents and the role of traffic and geometric variables in such accidents. This study investigated the major factors associated with large truck accidents including the effect of highway facility type and highway geometry, and the development of mathematical models relating the factors with accident rates and probability of occurrence. This first volume documents the methodology of the study, the results of a statistical analysis of large-trucks historical accident data, the results of a fault tree analysis. This second volume gives a detailed description of the development of the regression and logistic models.

Large Truck Accident Causation. Final Report

Author : J. P. Eicher
Publisher :
ISBN 13 :
Total Pages : 226 pages
Book Rating : 4.3/5 (91 download)

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Book Synopsis Large Truck Accident Causation. Final Report by : J. P. Eicher

Download or read book Large Truck Accident Causation. Final Report written by J. P. Eicher and published by . This book was released on 1982 with total page 226 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Heavy Vehicle Crashes in Urban Areas

Author : P. F. Sweatman
Publisher :
ISBN 13 :
Total Pages : 204 pages
Book Rating : 4.:/5 (1 download)

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Book Synopsis Heavy Vehicle Crashes in Urban Areas by : P. F. Sweatman

Download or read book Heavy Vehicle Crashes in Urban Areas written by P. F. Sweatman and published by . This book was released on 1995 with total page 204 pages. Available in PDF, EPUB and Kindle. Book excerpt: Research into the types, severity and causes of crashes involving heavy vehicles in urban Australia was carried out and countermeasures were recommended to reduce the incidence and severity of such crashes. The project included literature review, mass data analysis, detailed post crashes analysis of fatal crashes, analysis of accident black spots and in depth investigation. The study found significant deficiencies in driver, rider and pedestrian behaviour which directly relate to the causation of severe crashes. The critical importance of the traffic engineering design of controlled and uncontrolled intersections has been highlighted. The design of heavy vehicles for operation in urban areas also needs improvement and measures to reduce heavy vehicle aggresivity and to redress deficiencies in the driver's field of view are needed. Road accidents. Injuries. Motorcyclists. Pedestrians. Cyclist. Roads. Accident Black Spots. Trucks. Vehicle design. Urban areas. Countermeasures. Buses.

Determining the Extent and Characteristics of Overrepresentation of Large Truck Crashes in Daytime and Nighttime Work Zones

Author : Naveen Mokkapati
Publisher :
ISBN 13 :
Total Pages : pages
Book Rating : 4.:/5 (31 download)

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Book Synopsis Determining the Extent and Characteristics of Overrepresentation of Large Truck Crashes in Daytime and Nighttime Work Zones by : Naveen Mokkapati

Download or read book Determining the Extent and Characteristics of Overrepresentation of Large Truck Crashes in Daytime and Nighttime Work Zones written by Naveen Mokkapati and published by . This book was released on 2008 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: The growth of vehicle travel in the United States has accelerated wear on the interstate highway system leading to frequent pavement repair and rehabilitation projects. The presence of work zones not only causes traffic congestion and backup but also increases the crash risk. Therefore, the FHWA (Federal Highway Administration) has allotted a significant amount of funds to improve work zone traffic safety and operations. This thesis compares truck and automobile crash characteristics in work zones with those of non-work zones and thus identifies engineering countermeasures to improve work zone truck safety. The researcher used a contingency analysis approach in this study. First, he categorized the North Carolina crash data using different variables. Once categorized, the Breslow-Day test is used to compare the odds of truck and automobile crashes between work zones and non-work zones. Overall, the researcher did not find a significant difference between odds of truck and automobile crashes compared to previous studies. The researcher believes that the difference in results between the present study and the previous studies could either be due to differences in the approach used or better truck management techniques employed by the North Carolina DOT (Department of Transportation). The researcher also identified that the maintenance projects performed during the day had a significantly higher odds of truck crashes relative to that of automobiles in work zones compared to control sections when workers were present, either with a lane closure or without a lane closure. The researcher believes that the results from the day maintenance projects and its subcategories are the key findings of this study. Therefore, these key findings are used to identify the possible reasons and countermeasures for any disproportionate change in truck to automobile crashes. The identified list of countermeasures includes the use of law enforcement, a smart work zone system, a dynamic late merge system, CMS (Changeable Message Signs), speed display signs, and a CB (Citizen Band) Wizard. These countermeasures were checked for cost effectiveness using a benefit cost (B/C) analysis. The researcher found that law enforcement, smart work zones with costs lower than or equal to half a million dollars, CMS, speed display signs, and the CB Wizard have B/C ratios greater than one and seem to be worthwhile for deployment in work zones. Smart work zones with significantly higher costs of 2.5 million dollars, for example, could be deployed using a more detailed analysis of work zone characteristics. Finally, dynamic late merge system could be used if the site conditions indicate a crash reduction potential of at least 10 - 15 percent.

Characteristics of Large-truck Accidents as Represented in Texas Accident Data at HSRI.

Author : John A. Green
Publisher :
ISBN 13 :
Total Pages : 59 pages
Book Rating : 4.:/5 (547 download)

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Book Synopsis Characteristics of Large-truck Accidents as Represented in Texas Accident Data at HSRI. by : John A. Green

Download or read book Characteristics of Large-truck Accidents as Represented in Texas Accident Data at HSRI. written by John A. Green and published by . This book was released on 1975 with total page 59 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Commercial Motor Vehicle Driver Fatigue, Long-Term Health, and Highway Safety

Author : National Academies of Sciences, Engineering, and Medicine
Publisher : National Academies Press
ISBN 13 : 0309392527
Total Pages : 273 pages
Book Rating : 4.3/5 (93 download)

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Book Synopsis Commercial Motor Vehicle Driver Fatigue, Long-Term Health, and Highway Safety by : National Academies of Sciences, Engineering, and Medicine

Download or read book Commercial Motor Vehicle Driver Fatigue, Long-Term Health, and Highway Safety written by National Academies of Sciences, Engineering, and Medicine and published by National Academies Press. This book was released on 2016-09-12 with total page 273 pages. Available in PDF, EPUB and Kindle. Book excerpt: There are approximately 4,000 fatalities in crashes involving trucks and buses in the United States each year. Though estimates are wide-ranging, possibly 10 to 20 percent of these crashes might have involved fatigued drivers. The stresses associated with their particular jobs (irregular schedules, etc.) and the lifestyle that many truck and bus drivers lead, puts them at substantial risk for insufficient sleep and for developing short- and long-term health problems. Commercial Motor Vehicle Driver Fatigue, Long-Term Health and Highway Safety assesses the state of knowledge about the relationship of such factors as hours of driving, hours on duty, and periods of rest to the fatigue experienced by truck and bus drivers while driving and the implications for the safe operation of their vehicles. This report evaluates the relationship of these factors to drivers' health over the longer term, and identifies improvements in data and research methods that can lead to better understanding in both areas.

Large-Truck Crash Causation Study

Author : National Highway Traffic Safety Administration
Publisher : CreateSpace
ISBN 13 : 9781492398738
Total Pages : 56 pages
Book Rating : 4.3/5 (987 download)

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Book Synopsis Large-Truck Crash Causation Study by : National Highway Traffic Safety Administration

Download or read book Large-Truck Crash Causation Study written by National Highway Traffic Safety Administration and published by CreateSpace. This book was released on 2013-09-14 with total page 56 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Large-Truck Crash Causation Study (LTCCS) is a data collection project conducted by the National Highway Traffic Safety Administration (NHTSA) and the Federal Motor Carrier Safety Administration (FMCSA) of the United States Department of Transportation (USDOT). NHTSA's National Center for Statistics and Analysis (NCSA) worked together with FMCSA to develop the LTCCS, which was conducted within the National Automotive Sampling System (NASS) that NCSA operates. The tables in this report were created through the use of the data collected in the LTCCS. While the LTCCS collected data on approximately 1,000 variables, the tables presented in this report comprise only a sample of these variables. The complete LTCCS variable database can be used jointly to examine a large number of issues surrounding large-truck crashes. One section in the report focuses on “crash-level” variables, which provide counts of crashes that occurred under certain characteristics (i.e., crash counts stratified according to how many vehicles were in the crash). The next section includes tables that are presented at the “vehicle level.” These tables thus provide counts of the number of vehicles involved in certain types of crashes (i.e., vehicle counts that have been stratified by the injury severity of the person most severely injured in each vehicle). The tables in the following section are presented at the “driver level.” These tables display counts of drivers that were involved in certain crash scenarios (i.e., the number of drivers involved in the crashes, stratified by the age of the driver). The appendix includes tables and computer programs for calculating standard errors and confidence intervals using LTCCS data.

The Severity of Large Truck Accidents

Author : James H. Hedlund
Publisher :
ISBN 13 :
Total Pages : 44 pages
Book Rating : 4.3/5 (91 download)

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Book Synopsis The Severity of Large Truck Accidents by : James H. Hedlund

Download or read book The Severity of Large Truck Accidents written by James H. Hedlund and published by . This book was released on 1977 with total page 44 pages. Available in PDF, EPUB and Kindle. Book excerpt:

THE LARGE TRUCK CRASH CAUSATION STUDY

Author : Daniel Blower
Publisher :
ISBN 13 :
Total Pages : 23 pages
Book Rating : 4.L/5 (9 download)

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Book Synopsis THE LARGE TRUCK CRASH CAUSATION STUDY by : Daniel Blower

Download or read book THE LARGE TRUCK CRASH CAUSATION STUDY written by Daniel Blower and published by . This book was released on 2002 with total page 23 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Safety by Design

Author : Daniel C. Murray
Publisher :
ISBN 13 :
Total Pages : pages
Book Rating : 4.:/5 (75 download)

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Book Synopsis Safety by Design by : Daniel C. Murray

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.