Safety Effects of Horizontal Curve Design and Lane and Shoulder Width on Single Motorcycle Accidents in Norway

Factors related to the road infrastructure contribute to the occurrence of motorcycle accidents. This study investigates how design parameters of the existing rural two-lane road network in Norway influence the occurrence of single motorcycle accidents. The design elements considered in this study a...

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Published in:Journal of advanced transportation 2021, Vol.2021, p.1-11
Main Authors: Kvasnes, Sara, Pokorny, Petr, Jensen, Jan Kristian, Pitera, Kelly
Format: Article
Language:English
Subjects:
Accidents
Alignment
Case studies
Design
Design parameters
Fatalities
Geometry
Matching
Mathematical analysis
Motorcycles
Passengers
Risk factors
Road curves
Road design
Road shoulders
Roads
Roads & highways
Rural roads
Safety and security measures
Safety research
Segments
Shoulder
Speed limits
Statistical analysis
Traffic accidents & safety
Traffic control
Traffic flow
Transportation
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creator Kvasnes, Sara
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Jensen, Jan Kristian
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description Factors related to the road infrastructure contribute to the occurrence of motorcycle accidents. This study investigates how design parameters of the existing rural two-lane road network in Norway influence the occurrence of single motorcycle accidents. The design elements considered in this study are horizontal curvature (curve type, degree of curvature, and adjacent curve requirements) and lane and shoulder widths. A matched case-control study design was applied to investigate the safety effects of these elements. Cases were defined as segments experiencing at least one single motorcycle accident during the study period from 2013 to 2017, while controls were defined as segments not experiencing an accident in the same period. In order to identify the segments, a GIS analysis was performed on data collected from the National Road Database (NVDB). In case-control studies, matching allows us to control for confounding variables. AADT and speed limit were used as matching variables in this study. A matching ratio of 4 : 1 (i.e., four controls per case) was used, resulting in 752 controls being matched to 188 cases. The results indicate horizontal alignment to have a more significant effect on single motorcycle accidents compared to lane and shoulder widths. Segments with several adjacent reverse curves, with high curvature (R 
doi_str_mv 10.1155/2021/6684334
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source Publicly Available Content Database; ABI/INFORM Global; Wiley Open Access
subjects Accidents
Alignment
Case studies
Design
Design parameters
Fatalities
Geometry
Matching
Mathematical analysis
Motorcycles
Passengers
Risk factors
Road curves
Road design
Road shoulders
Roads
Roads & highways
Rural roads
Safety and security measures
Safety research
Segments
Shoulder
Speed limits
Statistical analysis
Traffic accidents & safety
Traffic control
Traffic flow
Transportation
title Safety Effects of Horizontal Curve Design and Lane and Shoulder Width on Single Motorcycle Accidents in Norway
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