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Author: Doc Burke
Publisher:
ISBN:
Category : Pavements
Languages : en
Pages : 51
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Book Description
This report presents procedures for identifying the pavement conditions and truck accident experience (by specified mileposts or tenths-of-mile) for interstate facility. Profiles of the pavement conditions are calculated and plotted. Accident site locations are ranked according to frequency of accidents (rates, types, severities, etc).
Author: Doc Burke
Publisher:
ISBN:
Category : Pavements
Languages : en
Pages : 51
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Book Description
This report presents procedures for identifying the pavement conditions and truck accident experience (by specified mileposts or tenths-of-mile) for interstate facility. Profiles of the pavement conditions are calculated and plotted. Accident site locations are ranked according to frequency of accidents (rates, types, severities, etc).
Author: James H. Hedlund
Publisher:
ISBN:
Category :
Languages : en
Pages : 44
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Book Description
Author: Ken Skorseth
Publisher:
ISBN:
Category : Gravel roads
Languages : en
Pages : 112
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Book Description
The purpose of this manual is to provide clear and helpful information for maintaining gravel roads. Very little technical help is available to small agencies that are responsible for managing these roads. Gravel road maintenance has traditionally been "more of an art than a science" and very few formal standards exist. This manual contains guidelines to help answer the questions that arise concerning gravel road maintenance such as: What is enough surface crown? What is too much? What causes corrugation? The information is as nontechnical as possible without sacrificing clear guidelines and instructions on how to do the job right.
Author: Dan R. Middleton
Publisher:
ISBN:
Category : Roads
Languages : en
Pages : 110
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Book Description
In addition to fatalities and injuries resulting from truck involved accidents, excessive costs and delays caused by these accidents and incidents have prompted several operating agencies to consider various strategies to reduce the truck accident/incident problem. This study was undertaken to identify truck accident countermeasures implemented in different areas of the U.S. Issues considered when selecting countermeasures for review in this study included urban freeway volumes of 95,000 vehicles per day or higher, a significant number of trucks in the traffic stream (typically 5% or more), and countermeasures involving road design. The study omitted countermeasures directly related to the vehicle and the driver. This project included the following steps: literature search, telephone survey, and field visits to selected sites. The information collected by this project is intended to assist agencies in identifying, selecting, and implementing truck accident countermeasures. Experiences with the following truck accident countermeasures are included in the report: lane restrictions, separate truck facilities, ramp treatments, truck diversions and bans, reduction of shoulder parking, urban truck inspection stations, incident response management, differential speed limit, increased enforcement, tall barriers, and mainlane treatments.
Author: Siddhartha Kotikalapudi
Publisher:
ISBN:
Category :
Languages : en
Pages :
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Book Description
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.
Author: Paul H. Wright
Publisher:
ISBN:
Category : Traffic accidents
Languages : en
Pages : 68
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Book Description
Author: Nicholas J. Garber
Publisher:
ISBN:
Category : Intelligent transportation systems
Languages : en
Pages : 72
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Book Description
The use of large trucks has steadily increased since the passage of the Surface Transportation Assistance Act to the point where they now account for over 50% of vehicle traffic on some highways in Virginia. Projections now forecast that large-truck travel will grow at twice the rate of personal vehicle travel in the near future. Although several studies have been conducted to determine the effects of large trucks on safety on multilane primary and interstate highway systems, the effects on two-lane secondary roads have been largely ignored. This study identified the causal factors and predominant types of large-truck crashes on two-lane secondary roads in Virginia and compared the large-truck crash rates for two-lane secondary roads and two-lane primary roads. The study also identified advanced technologies associated with intelligent transportation systems (ITS) that can be used to minimize the causal factors of large-truck crashes on these roads. The results showed that large-truck crash rates are significantly higher on two-lane secondary roads than on two-lane primary roads, with the predominant types of crashes being angle, rear end, sideswipe same direction, and sideswipe opposite direction. The study identified several ITS technologies that can be used to mitigate the predominant causal factors and recommends a pilot study to test the effectiveness of one such system.
Author: Rebecca Elise Franke
Publisher:
ISBN: 9781321063035
Category : Petroleum industry and trade
Languages : en
Pages : 90
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Book Description
Roadway safety is an integral part of a functioning infrastructure. Many types of vehicles use the highway system for a variety of purposes, and each affects the roadways differently. Aside from commuter traffic and leisurely travel, a major use of the highway system is the transport of goods. These goods are typically transferred in large trucks. As supply and demand grows, the amount of trucks on the roadways needed to transport goods increases. The United States has experienced constant growth in the amount of freight transported by truck in the last few years. While overall national freight growth is constant, localized effects are more varied. Freight traffic may spike in areas based on events such as a new factory, or the discovery of a natural resource. These additions to a localized area can be taxing on the citizens and infrastructure, and the effect that truck traffic has on these areas may be more concentrated. The state of Wyoming has begun to experience a large increase in truck traffic on some of its local and county roads due to an increase in oil and gas production. The primary measure to evaluate the safety of a roadway is the number of crashes. This study addresses the effect that large truck traffic is having on the safety of various road sizes and classifications. For this study, large trucks are defined as vehicles weighing more than 26,000 pounds and the safety is measured by a crash's severity. An investigation on past literature revealed that many studies have been done on the factors involved in and the causation of heavy truck crashes, but none address the causation and effect the truck crashes have on different types of areas. Answers to this question may give transportation engineers guidelines on how to address truck safety in specific types of areas. A descriptive analysis of statewide crash data revealed many different trends in crashes. Most truck crashes occurred on interstates and primary federal highways. When road conditions were not clear, crashes more often occurred when snowy weather and icy roads were present. Heavy trucks were involved in multi-vehicle crashes less often than passenger vehicles. To verify some of the effects from the descriptive analysis, a logistic regression model was used to further explore the results. A localized study was also conducted to acquire better knowledge of the effect that trucks were having on local roads. This crash analysis focused on four counties in Eastern Wyoming and found that where truck traffic volumes have been increasing, so have crash rates in those counties.
Author:
Publisher:
ISBN:
Category : Disabled vehicles on express highways
Languages : en
Pages : 260
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Book Description
To address the growing problem of congestion caused by incidents, especially truck-involved incidents, this study was undertaken to identify truck accident countermeasures which have been used nationwide. Desired conditions surrounding implemented countermeasures in this study included urban freeway volumes of 95,000 vehicles per day or higher, a significant number of trucks in the traffic stream (typically 5% or more), and countermeasures involving road design. The study omitted countermeasures directly related to the vehicle and the driver. This project included the following steps: literature search, telephone survey, and field visits to selected sites. The information collected by this project is intended to assist agencies in identifying, selecting, and implementing truck accident countermeasures. Information was gathered on the following truck accident countermeasures: lane restrictions, separate truck roadways, urban inspection stations, ramp treatments, major incident response and clearance, and truck bans/diversion and time restrictions.
Author: Arthur C. Wolfe Oliver M. Carsten
Publisher:
ISBN:
Category :
Languages : en
Pages : 90
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Book Description
