What question did this study set out to answer?

To establish an automated, scalable framework for detecting motorcycle crash hotspots and identifying visually observable road-infrastructure risk factors using street-view imagery.

August 19, 2026Accident Analysis & PreventionOpen Access

Street view-based infrastructure assessment of motorcycle hotspots: A national road network analysis in Thailand

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Authors

NJNatchapon JongwiriyanurakDepartment of Space JHJames HaworthDepartment of Space HAHoria AmeenUniversidade de Vigo

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Implication

Spatial network analysis reveals motorcycle crash concentration patterns on national roads, indicating commercial access and roadside hazards associate with severe hotspots.

Key Points

To establish an automated, scalable framework for detecting motorcycle crash hotspots and identifying visually observable road-infrastructure risk factors using street-view imagery.
Analyzed motorcycle crash records from the Thailand Road Accident Management System (2019–2024) across 100 m segments using Network Kernel Density Estimation (NKDE) to quantify severity-weighted crash concentration.
Processed Mapillary Street-View Imagery using a Vision–Language Model pipeline to extract 27 iRAP-aligned infrastructure attributes on hotspot and matched control segments.
Trained an XGBoost classification model incorporating validated visual features and traffic-volume proxies, using SHAP values to evaluate feature importance.
The top 1.0% of the national road network length accounted for 52.2% of all severity-weighted motorcycle crashes.
Hotspot classification was most strongly associated with commercial access activity, high traffic-exposure proxies, rigid roadside obstacles, and constrained median and roadside environments.

Cite This Study

Jongwiriyanurak et al. (2026) studied this question.

synapsesocial.com/papers/6a858aaf03308d306e2d7fc1 https://doi.org/10.1016/j.aap.2026.108706

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Implication

Spatial network analysis reveals motorcycle crash concentration patterns on national roads, indicating commercial access and roadside hazards associate with severe hotspots.

Street view-based infrastructure assessment of motorcycle hotspots: A national road network analysis in Thailand

Discussion

Member takes

Implication

Key Points

Cite This Study

Street view-based infrastructure assessment of motorcycle hotspots: A national road network analysis in Thailand

Discussion

Member takes

Implication

Key Points

Cite This Study

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