Speed-Based Safety Evaluation of Horizontal Curves in Rural Highways

Choudhari, Tushar; Sil, Gourab; Maji, Avijit

doi:10.1007/978-981-16-9636-7_12

Cited by 3 publications

(1 citation statement)

References 36 publications

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“…IHSDM also supports the evaluation module for design consistency [16]. Te review shows that operating speed consistency [17,18], trafc volume and crash consistency [19,20], vehicle stability and driver workload consistency [21], and design consistency of highway elements as well as sight distance consistency [22,23] were considered to be the research focus.…”

Section: Literature Reviewmentioning

confidence: 99%

Safety Evaluation for Highway Geometric Design Based on Spatial Path Properties

Wang

2023

Journal of Advanced Transportation

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Safety is an important aspect of road design. In highway geometric design, road engineers use a two-stage design method due to its convenience, but the available two-dimensional design tools on the market are believed to impose limitations. Horizontal and vertical alignment parameters are considered and determined at the designer’s discretion, potentially downplaying the three-dimensional characters of spatial curves. This study focuses on the three-dimensional characteristics of highway alignments and investigates a safety evaluation method to establish the relationship between crash rate and spatial curve properties. This will necessitate an analytical investigation into the effects of higher-order properties, such as curvature and torsion, on the geometry of spatial Cartesian curves. First, these combinations of horizontal and vertical alignments were categorized into six classifications, each with its own spatial expression in mathematical form. After manipulating the curvature and torsion of the spatial curve algebraically, the correlation between geometric design variables and crash rate was ultimately established. A few cases involving geometric design data and crash facts were utilized for verification. The results revealed a considerable positive correlation between curvature or torsion variance and crashes per million vehicles kilometers, as a slight difference between curvature and torsion could also be spotted. And curvature distribution is correlated with collision frequency more closely than torsion spatial variation.

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Section: Literature Reviewmentioning

confidence: 99%

Safety Evaluation for Highway Geometric Design Based on Spatial Path Properties

Wang

2023

Journal of Advanced Transportation

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Influence of Horizontal Curve Geometry on Operating Speeds on Four-Lane Divided Highways Under Heterogeneous Traffic Conditions

Tottadi

Varma

Mehar

2022

J. Inst. Eng. India Ser. A

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Drivers’ ability to distinguish consecutive horizontal curves

et al. 2022

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Driver error in distinguishing preceding and upcoming horizontal curves can lead to single-vehicle fatal crashes. The 3D perspective views of different horizontal curve stimuli were used to examine a representative sample of volunteering drivers’ ability to distinguish consecutive horizontal curves. A probit model, developed using the recorded responses, revealed that differences in radius and deflection angle between the consecutive curves are more likely to influence, whereas radius and deflection angle of reference curve are less likely to influence drivers in distinguishing consecutive curves. The sensitivity analysis of the model parameters indicated a difference in radius between the consecutive curves as the most and deflection angle of reference curve as the least sensitive parameters. The estimated marginal effects are useful for evaluating the design and safety of consecutive curves from the drivers’ perspective. Finally, nomograms were developed for relevant applications.

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Speed-Based Safety Evaluation of Horizontal Curves in Rural Highways

Cited by 3 publications

References 36 publications

Safety Evaluation for Highway Geometric Design Based on Spatial Path Properties

Safety Evaluation for Highway Geometric Design Based on Spatial Path Properties

Influence of Horizontal Curve Geometry on Operating Speeds on Four-Lane Divided Highways Under Heterogeneous Traffic Conditions

Drivers’ ability to distinguish consecutive horizontal curves

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