Injury severities of truck drivers in single- and multi-vehicle accidents on rural highways

This study investigates the safety effects of combined horizontal and vertical alignments using accident occurrences on two-lane rural highways in Washington. Eight statistical models were developed to establish the relationships between vehicle accidents and their associated factors for eight combinations of alignments by the Poisson, negative binomial, zero-inflated Poisson, and zero-inflated negative binomial. Three selected models were validated. The findings show that degree of curvature is the most successful predictor for horizontal curves combined with vertical alignments. A minimum ratio of 25 of vertical curve radius to horizontal curve radius is recommended for a curve with radius of smaller than 6000 ft (or 1830 m). Vertical curves have relatively little influence on accident occurrences at horizontal tangents. The grade value and length of a grade increase accident occurrences when a horizontal curve or tangent is on a grade. A smaller curve should be avoided introducing at a steep grade.

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Collision prediction on combined horizontal and vertical alignments of two-lane rural highways.

10.32920/ryerson.14653203 ◽

2021 ◽

Author(s):

Qing Chong You

Keyword(s):

Associated Factors ◽

Negative Binomial ◽

Horizontal Curve ◽

Rural Highways ◽

Vehicle Accidents ◽

Horizontal Curves ◽

Curve Radius ◽

Grade Increase ◽

Minimum Ratio ◽

Successful Predictor

This study investigates the safety effects of combined horizontal and vertical alignments using accident occurrences on two-lane rural highways in Washington. Eight statistical models were developed to establish the relationships between vehicle accidents and their associated factors for eight combinations of alignments by the Poisson, negative binomial, zero-inflated Poisson, and zero-inflated negative binomial. Three selected models were validated. The findings show that degree of curvature is the most successful predictor for horizontal curves combined with vertical alignments. A minimum ratio of 25 of vertical curve radius to horizontal curve radius is recommended for a curve with radius of smaller than 6000 ft (or 1830 m). Vertical curves have relatively little influence on accident occurrences at horizontal tangents. The grade value and length of a grade increase accident occurrences when a horizontal curve or tangent is on a grade. A smaller curve should be avoided introducing at a steep grade.

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The joint effect of weather and lighting conditions on injury severities of single-vehicle accidents

Analytic Methods in Accident Research ◽

10.1016/j.amar.2020.100124 ◽

2020 ◽

Vol 27 ◽

pp. 100124 ◽

Cited By ~ 9

Author(s):

Grigorios Fountas ◽

Achille Fonzone ◽

Niaz Gharavi ◽

Tom Rye

Keyword(s):

Joint Effect ◽

Vehicle Accidents ◽

Lighting Conditions ◽

Single Vehicle ◽

Injury Severities

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Bicyclist injury severities in bicycle–motor vehicle accidents

Accident Analysis & Prevention ◽

10.1016/j.aap.2006.07.002 ◽

2007 ◽

Vol 39 (2) ◽

pp. 238-251 ◽

Cited By ~ 267

Author(s):

Joon-Ki Kim ◽

Sungyop Kim ◽

Gudmundur F. Ulfarsson ◽

Luis A. Porrello

Keyword(s):

Motor Vehicle ◽

Motor Vehicle Accidents ◽

Vehicle Accidents ◽

Injury Severities

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A Reassessment of Suicide Measurement

Crisis ◽

10.1027/0227-5910.30.1.6 ◽

2009 ◽

Vol 30 (1) ◽

pp. 6-12 ◽

Cited By ~ 3

Author(s):

D.P. Doessel ◽

Ruth F.G. Williams ◽

Harvey Whiteford

Keyword(s):

Causes Of Death ◽

Motor Vehicle ◽

Years Of Life Lost ◽

Health Prevention ◽

Prevention Strategies ◽

Vehicle Accidents ◽

The Social ◽

Evaluation Exercise ◽

Two Measures ◽

Circulatory Diseases

Background. Concern with suicide measurement is a positive, albeit relatively recent, development. A concern with the social loss from suicide requires careful attention to appropriately measuring the phenomenon. This paper applies two different methods of measuring suicide data: the conventional age-standardized suicide (count) rate; and the alternative rate, the potential years of life lost (PYLL) rate. Aims. The purpose of applying these two measures is to place suicide in Queensland in a historical and comparative (relative to other causes of death) perspective. Methods. Both measures are applied to suicide data for Queensland since 1920. These measures are applied also to two largish causes of death and two smaller causes of death, i.e., circulatory diseases, cancers, motor vehicle accidents, suicide. Results. The two measures generate quite different pictures of suicide in Queensland: Using the PYLL measure, suicide is a quantitatively larger issue than is indicated by the count measure. Conclusions. The PYLL measure is the more appropriate measure for evaluation exercise of public health prevention strategies. This is because the PYLL measure is weighted by years of life lost and, thus, it incorporates more information than the count measure which implicitly weights each death with a somewhat partial value, viz. unity.

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