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Author: Nicholas J. Garber
Publisher:
ISBN:
Category :
Languages : en
Pages : 79
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Book Description
Author: Nicholas J. Garber
Publisher:
ISBN:
Category :
Languages : en
Pages : 79
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Book Description
Author: Nicholas J. Garber
Publisher:
ISBN:
Category : Pavements
Languages : en
Pages : 98
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Book Description
Safety at construction and maintenance zones is now considered as one of the major concerns of traffic and highway engineers, particularly in urban areas where the installation of work zones significantly affect the flow of traffic . This issue is getting more important as greater emphasis is placed on maintenance and rehabilitation work rather than on new construction, resulting in the proliferation of work zones in the nation's highways. Preliminary analysis of accident data at urban workzones in Virginia indicates that accident rates tend to be significantly higher when work zones coupled with the expected increase in traffic volume will result in significant increase in accident rates, unless effective measures are taken to increase safety at these work zones. The identification of effective safety counter measures at urban work zones, however, requires a clear understanding of work zone accident characteristics and knowledge of the effectiveness of different traffic control devices commonly used. A study was therefore conducted to identify the predominant accident characteristics in urban work zones in Virginia and to evaluate the effectiveness of different traffic control devices in reducing the increase in accident rates during periods of work zone activities. This paper presents the results of statistical analyses of accident data for different work zones and the predominant accident characteristics identified from these analyses. While significant increase in accident rates were observed, there was no significant difference observed in type and severity of accidents. For the covering abstract of this Conference see IRRD abstract number 853851.
Author: Nicholas J. Garber
Publisher:
ISBN:
Category : Road work zones
Languages : en
Pages : 44
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Book Description
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.
Author: Jerry G. Pigman
Publisher:
ISBN:
Category : Roads
Languages : en
Pages : 58
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Book Description
Author: Tae-Jun Ha
Publisher:
ISBN:
Category :
Languages : en
Pages : 596
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Book Description
Author: H. Gene Hawkins
Publisher:
ISBN:
Category : Roads
Languages : en
Pages : 178
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Book Description
Author: Jerry L. Graham
Publisher:
ISBN:
Category : Roads
Languages : en
Pages : 240
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Book Description
The report includes results of two studies of construction zone traffic control. The first study involved analysis of traffic accidents occurring in 79 zones in seven states. Results indicate a before to during accident rate increase of 6.8%. Results also include breakdowns by accident types, severity, light conditions, roadway type, area type, work area roadway type, construction type and state. The second study was field testing of speed reduction methods. Speeds, erratic maneuvers and conflicts were measured at three sites--an urban freeway, a rural freeway, and an urban street. The field studies examined the effect of the following construction zone parameters on vehicle speeds and safety: Sequential flashing arrow boards; speed zoning (advisory and regulatory); enforcement; transverse striping; obliteration of nonappropriate pavement markings; taper length; lane width reduction; and active warning of speed zoning. Recommended guidelines for construction zone traffic controls are also included.
Author: H. Gene Hawkins
Publisher:
ISBN:
Category : Arterial streets and roads
Languages : en
Pages : 118
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Author: Jerome W. Hall
Publisher:
ISBN:
Category : Roads
Languages : en
Pages : 68
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Book Description
Author: Yong Bai
Publisher:
ISBN:
Category : Crash injuries
Languages : en
Pages : 172
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Book Description
The primary objective of this research was to investigate the characteristics of fatal crashes and risk factors to these crashes in the work zones so that effective countermeasures could be developed and implemented in the near future. The objective was accomplished using a four-step approach.
