Journal ArticleDOI
Curve Collisions: Road and Collision Characteristics and Countermeasures
TLDR
In this article, the authors characterize collisions reported to be on two-lane road curves in North Carolina using the Highway Safety Information System (HISIS) and provide recommendations from the literature to treat overrepresented collision types on horizontal curves, such as collisions on grades, rural, severe injury or fatal, fixed object (particularly tree, ditch, and embankment), overturn, off peak hours (particularly during darkness on unlighted roads), weekend, holiday periods, and wet, icy, or snowy pavement.Abstract:
Horizontal curves are relatively dangerous portions of roadway networks. Agencies optimizing the use of safety funds should be aware of characteristics of the collisions on those segments. However, few previously published articles attempted to characterize collisions on horizontal curves. This article describes an effort that characterized collisions reported to be on curves in North Carolina using the Highway Safety Information System. More than 51,000 North Carolina (NC) collisions on two-lane road curves were compared to collisions on all two-lane roads and on all roads. In doing so we gained a perspective of how well various curves perform relative to other road areas. We investigated numerous two-lane curve-collision types. Those most overrepresented included: collisions on grades, rural, severe injury or fatal, fixed object (particularly tree, ditch, and embankment), overturn, off-peak hours (particularly during darkness on unlighted roads), weekend, holiday periods, and wet, icy, or snowy pavement. The analysis also revealed that there were few short roadway segments (of 0.1- to 1-mile length) with more than 10 reported curve collisions in 3 years. This article provides recommendations from the literature to treat overrepresented collision types on horizontal curves. Based on the analysis findings, agencies should target countermeasures for the most common and overrepresented collision types.read more
Citations
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Journal ArticleDOI
Effects of fog, driver experience and gender on driving behavior on S-curved road segments
TL;DR: The experimental results indicated that drivers tended to drive more cautiously in heavy fog, but the driving risk was still increased, especially in the transition stage from the straight segment to the S-curve, and the NP female drivers were found to be the most vulnerable group in S-Curve driving.
Journal ArticleDOI
Modeling the impact of spatial relationships on horizontal curve safety
TL;DR: The distances to adjacent curves were found to be a reliable predictor of observed collisions and recommended a model which utilizes spatial considerations for horizontal curve safety prediction in addition to current Highway Safety Manual prediction capabilities using individual curve geometric features.
Journal ArticleDOI
A study on driving performance along horizontal curves of rural roads
TL;DR: The results confirm that driving simulation can disclose the relationships between road design features and driver behavioral aspects that are crucial issues in creating a safer road infrastructure.
Journal ArticleDOI
Exploring injury severity in head-on crashes using latent class clustering analysis and mixed logit model: A case study of North Carolina
Pengfei Liu,Wei Fan +1 more
TL;DR: This study aims to investigate the contributing factors that affect the injury severity of head-on crashes and develop appropriate countermeasures and proposed method is able to uncover the heterogeneity within the whole dataset and the homogeneous clusters.
Journal ArticleDOI
Effects of Geometry and Pavement Friction on Horizontal Curve Crash Frequency
TL;DR: In this paper, the authors developed a crash modification factor (CMF) for skid number for all crashes, wet-weather crashes, run-off-the-road crashes, and wet-water runoff-to-theroad crashes.
References
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Cost-effective geometric improvements for safety upgrading of horizontal curves
TL;DR: In this article, the authors determine the horizontal curve features which affect safety and traffic operations and quantify the effects on accidents of various curve-related improvements, such as widening and widening.
Low-Cost Treatments for Horizontal Curve Safety
Hugh W McGee,Fred R Hanscom +1 more
TL;DR: In this paper, the authors provide practical information on low-cost treatments that can be applied at horizontal curves to address identified or potential safety problems, including basic traffic signs and markings found in the Manual on Uniform Traffic Control Devices (MUTCD), enhanced traffic control devices; additional traffic control device not found in MUTCD; Rumble strips; minor roadway improvements; and innovative and experimental treatments.
Journal Article
Guidance for implementation of the aashto strategic highway safety plan. volume 6: a guide for addressing run-off-road collisions
TL;DR: The AASHTO Strategic Highway Safety Plan is to reduce annual highway fatalities by 5,000 to 7,000, which can be achieved through widespread application of low-cost, proven countermeasures that reduce the number of crashes on the nation's highways as discussed by the authors.
Journal Article
Analysis of design attributes and crashes on the Oregon highway system.
TL;DR: Crash models of this type provide states with an opportunity to validate the CRFs that are most important economically and represent countermeasures associated with the more costly outlays that states make to improve safety.
Journal Article
Highway safety information system
TL;DR: The Federal Highway Administration and the University of North Carolina Highway Safety Research Center have acquired State data for a new highway safety data base - the Highway Safety Information System (HSIS).