Crime on the mass transit system in Hong Kong: a hotspots and harmspots trajectory approach

PurposeA growing body of literature focuses on crime hotspots; however, less is known about the spatial distribution of crime at mass transit systems, and even less is known about trajectory patterns of hotspots in non-English-speaking countries.Design/methodology/approachThe spatiotemporal behaviour of 1,494 crimes reported to the Hong Kong's Railway Police District across a two-year period was examined in this study. Crime harm weights were then applied to offences to estimate the distribution of crime severity across the transit system. Descriptive statistics are used to understand the temporal and spatial trends, and k-means longitudinal clustering are used to examine the developmental trajectories of crime in train stations over time.FindingsAnalyses suggest that 15.2% and 8.8% of stations accounted for 50% of all counted crime and crime harm scores, respectively, indicating the predictability of crime and harm to occur at certain stations but not others. Offending persists consistently, with low, moderate and high counts and harm stations remaining the same over time.Research limitations/implicationsThese findings suggest that more localised crime control initiatives are required to target crime effectively.Originality/valueThis is one of the only studies focusing on hotspots and harmspots in the mass transit system.