What is the effect of reduced street lighting on crime and road traffic injuries at night? A mixed-methods study

Perkins, Chloe; Steinbach, Rebecca; Tompson, Lisa; Green, John; Johnson, Shane D.; Grundy, Chris; Wilkinson, Paul; Edwards, Phil · 2015 · OpenAlex-citations

DOI: 10.3310/phr03110

archive: archived pipeline: cataloged verified

Get this paper ↗ (DOI — opens at the source; we link to it, we don't host it)

Summary

This mixed-methods study evaluates the public health impacts of reduced street lighting in England and Wales, specifically examining effects on crime rates and road traffic injuries. The research was motivated by local authorities’ adoption of energy-saving measures, such as switching off lights, dimming, or installing LEDs, which raised public concerns regarding safety and well-being. The study aimed to determine whether these interventions negatively affected public health outcomes or if the perceived risks were unfounded. The methodology comprised three components: a rapid appraisal of public views, a controlled interrupted time series analysis of quantitative data, and a cost–benefit analysis (CBA). The quantitative analysis utilized data from 62 local authorities. Road traffic collision data (STATS19) from 2000–2013 were analyzed at the street segment level, while crime data (Police.uk) from December 2010–December 2013 were analyzed at the middle super output area (MSOA) level. Regression models controlled for temporal trends and geographical variations, with effect estimates pooled in random-effects meta-analyses. The qualitative component involved ethnographic data and household surveys in eight case study areas to assess public perceptions. The results indicated no evidence that reduced street lighting was associated with an increase in road traffic collisions at night. Similarly, there was no overall evidence linking reduced lighting to increased crime. However, significant heterogeneity existed in crime estimates across police forces. Weak evidence suggested a reduction in crime associated with dimming (rate ratio [RR] 0.84, 95% confidence interval [CI] 0.70 to 1.02) and white light/LEDs (RR 0.89, 95% CI 0.77 to 1.03). Qualitatively, public concerns centered on personal security, fear of crime, and sleep quality, though lighting reductions were largely unnoticed or had marginal impacts on well-being for most residents. The CBA suggested that part-night lighting may represent a net benefit to local authorities. The study concludes that switch-off, part-night lighting, dimming, and LED conversions do not appear to harm levels of road traffic collisions or crime in England and Wales. However, the authors note limitations, including the inability to account for other concurrent safety initiatives like CCTV or improved road markings, which may confound associations. The CBA also excluded intangible impacts such as fear of crime. The findings imply that energy-saving lighting policies are likely safe regarding crime and traffic injuries, but further research is needed to understand how lighting affects crime prevention opportunities and other public health impacts, such as psychological well-being and mobility.

Provenance

The full processing record for this entry. Every stage of this paper's journey through the pipeline is logged — what ran, with which tool and model, how many attempts it took, and when it last completed.

Summary generated by qwen3.6-27b-prismaquant on 2026-06-26; verification: verified.

Topics

Ranked by relevance to this paper. Hover a topic for its definition.

• roadway lighting effects