Speeding and Light Levels (04-09-19)

Research indicates that as lighting levels decrease, people drive more quickly.  De Bellis and colleagues “examine[d] real-world speeding behavior and its interaction with illuminance, an environmental property defined as the luminous flux incident on a surface. Drawing on an analysis of 1.2 million vehicle movements, we show that reduced illuminance levels are associated with increased speeding. This relationship persists when we control for factors known to influence speeding (e.g., fluctuations in traffic volume) and consider proxies of illuminance (e.g., sight distance).”

Emanuel de Bellis, Michael Schulte-Mecklenbeck, Wernher Brucks, Andreas Hermann, and Ralph Hertwig.  2018. “Blind Haste:  As Light Decreases, Speeding Increases.”  PLoS ONE, vol. 13, no. 1, article e0188951, https://doi.org/10.1371/journal.pone.0188951