Road traffic casualties represent a hidden global epidemic, demanding evidence-based interventions. This paper demonstrates a network lattice approach for identifying road segments of particular concern, based on a case study of a major city (Leeds, UK), in which 5862 crashes of different severities were recorded over an 8-year period (2011–2018). We consider a family of Bayesian hierarchical models that include spatially structured and unstructured random effects to capture the dependencies between the severity levels. Results highlight roads that are more prone to collisions, relative to estimated traffic volumes, in the north-west and south of city centre. We analyse the modifiable areal unit problem (MAUP), proposing a novel procedure to investigate the presence of MAUP on a network lattice. We conclude that our methods enable a reliable estimation of road safety levels to help identify ‘hotspots’ on the road network and to inform effective local interventions.

Gilardi, A., Mateu, J., Borgoni, R., & Lovelace, R. (2022). Multivariate hierarchical analysis of car crashes data considering a spatial network lattice. JOURNAL OF THE ROYAL STATISTICAL SOCIETY. SERIES A. STATISTICS IN SOCIETY [10.1111/rssa.12823].

Multivariate hierarchical analysis of car crashes data considering a spatial network lattice

Gilardi, Andrea
;
Borgoni, Riccardo;
2022

Abstract

Road traffic casualties represent a hidden global epidemic, demanding evidence-based interventions. This paper demonstrates a network lattice approach for identifying road segments of particular concern, based on a case study of a major city (Leeds, UK), in which 5862 crashes of different severities were recorded over an 8-year period (2011–2018). We consider a family of Bayesian hierarchical models that include spatially structured and unstructured random effects to capture the dependencies between the severity levels. Results highlight roads that are more prone to collisions, relative to estimated traffic volumes, in the north-west and south of city centre. We analyse the modifiable areal unit problem (MAUP), proposing a novel procedure to investigate the presence of MAUP on a network lattice. We conclude that our methods enable a reliable estimation of road safety levels to help identify ‘hotspots’ on the road network and to inform effective local interventions.
Si
Articolo in rivista - Articolo scientifico
Scientifica
Bayesian hierarchical models; car crashes data; MAUP; multivariate modelling; network lattice; spatial networks;
English
Gilardi, A., Mateu, J., Borgoni, R., & Lovelace, R. (2022). Multivariate hierarchical analysis of car crashes data considering a spatial network lattice. JOURNAL OF THE ROYAL STATISTICAL SOCIETY. SERIES A. STATISTICS IN SOCIETY [10.1111/rssa.12823].
Gilardi, A; Mateu, J; Borgoni, R; Lovelace, R
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Utilizza questo identificativo per citare o creare un link a questo documento: http://hdl.handle.net/10281/363000
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