Many local authorities have reduced public lighting(CLASSIC) at night to save money and reduce carbon emissions. So far, there is no evidence that these reductions have an impact on health. We quantified the effects of four public lighting adaptation strategies (closed, partial night lighting, dimming, and white light) on road injuries and crime.
Methodological observations were based on an analysis of geocoded police data on road traffic collisions and crimes by 62 local authorities. The conditional Poisson model is used to analyze the longitudinal variation of nighttime collision counts on affected roads from 2000 to 2013, as well as crimes in the super-output area during the 2010-2013 census. Estimated effects on regional time trends for casualties and crime.
As a result, there is no evidence that any public lighting adaptation strategy is associated with changes in nighttime collisions. There is a significant statistical heterogeneity in the impact of police forces on crime. Overall, there is no evidence that there is a correlation between the total number of crimes and closure (RR 0.11; 95% CI 0.01 to 2.75) or partial night illumination (RR 0.96; 95% CI 0.86 to 1.06). There is evidence of a reduction in the total number of crimes and dimming (RR 0.84; 95% CI 0.70-1.02) and white light (RR 0.89; 95% CI 0.77-1.03).
Conclusions This study found that there is little evidence of harmful effects such as road closure or crime closure, nighttime illumination, dimming or white light/LED changes in England and Wales.
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