Department for Transport. (2010, September). Road Safety Research Report No. 112 Understanding Public Attitudes to Road-User Safety – Literature Review: Final Report. Retrieved from
http://eprints.uwe.ac.uk/11963/1/rsrr1112.pdf [accessed 18 January 2018]
Cairns, J., Warren, J., Garthwaite, K., Greig, G., & Bambra, C. (2014). Go slow: an umbrella review of the effects of 20 mph zones and limits on health and health inequalities. Journal of Public Health, 37(3), 515-520. doi: https://doi.org/10.1093/pubmed/fdu067
Calderdale Council. (2018, April). Update report – 20mph speed limits in Calderdale. [accessed 18 January 2019]
Jones, S., & Brunt, H. (2017). Twenty miles per hour speed limits: a sustainable solution to public health problems in Wales. Journal of Epidemiology and Community Health, 71(7), 699-706. doi: https://jech.bmj.com/content/71/7/699.info
National Institute for Health and Care Excellence. (2017, June). Air pollution: outdoor air quality and health. Retrieved from
https://www.nice.org.uk/guidance/ng70 [accessed 18 January 2019]