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Effects of dynamic street lighting on walking speed and reading perfomance : a full-scale laboratory study

Pedersen, Eja LU and Johansson, Maria LU (2015)
Abstract
Dynamic lighting systems are introduced in urban outdoor environments with the objective to reduce energy use. Effects on pedestrians are not fully known. Previous studies have mainly used observer assessment (Viliunas et al., 2014), and focused on perceived personal safety (Haans & de Kort, 2012) or acceptance (Boomsma & Steg, 2013). In this study, performance (walking speed and reading) was assessed in a full-scale laboratory arranged as an outdoor environment with a 19m pathway and a luminaire (LED). A movement detector was placed 10m before the luminaire. Participants (N = 61) walked the pathway at slower speed if the lighting was dimed, although light levels increased to 100% when they passed the sensor, than if the light... (More)
Dynamic lighting systems are introduced in urban outdoor environments with the objective to reduce energy use. Effects on pedestrians are not fully known. Previous studies have mainly used observer assessment (Viliunas et al., 2014), and focused on perceived personal safety (Haans & de Kort, 2012) or acceptance (Boomsma & Steg, 2013). In this study, performance (walking speed and reading) was assessed in a full-scale laboratory arranged as an outdoor environment with a 19m pathway and a luminaire (LED). A movement detector was placed 10m before the luminaire. Participants (N = 61) walked the pathway at slower speed if the lighting was dimed, although light levels increased to 100% when they passed the sensor, than if the light level was held constant at 100% (F(4, 212) = 6.67, p<0.001, ω2 = 0.01). Consistently, the visibility was rated lower in the dimed than in the constant condition (F(4, 240) = 2.53, p<0.05, ω2 = 0.01). Reading performance decreased with increased dimming (F(2, 120) = 33.89, p<0.001, ω2 = 0.08), but was not influenced by previous diming in the 100% condition. The results imply that the effect on pedestrians’ performance should be weighed against energy usage in the introduction of dynamic outdoor lighting. (Less)
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Other contribution
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published
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publisher
11th Biennial Conference on Environmental Psychology, August 24 - 26 2015 in Gronningen, The Netherlands
language
English
LU publication?
yes
id
529eea83-a4f8-4367-b4d5-87b19fa13528
alternative location
http://bcep2015.nl/scientific-program/monday-poster-session/poster-session/
date added to LUP
2017-03-28 11:32:45
date last changed
2017-05-08 14:28:26
@misc{529eea83-a4f8-4367-b4d5-87b19fa13528,
  abstract     = {Dynamic lighting systems are introduced in urban outdoor environments with the objective to reduce energy use. Effects on pedestrians are not fully known. Previous studies have mainly used observer assessment (Viliunas et al., 2014), and focused on perceived personal safety (Haans &amp; de Kort, 2012) or acceptance (Boomsma &amp; Steg, 2013). In this study, performance (walking speed and reading) was assessed in a full-scale laboratory arranged as an outdoor environment with a 19m pathway and a luminaire (LED). A movement detector was placed 10m before the luminaire. Participants (N = 61) walked the pathway at slower speed if the lighting was dimed, although light levels increased to 100% when they passed the sensor, than if the light level was held constant at 100% (F(4, 212) = 6.67, p&lt;0.001, ω2 = 0.01). Consistently, the visibility was rated lower in the dimed than in the constant condition (F(4, 240) = 2.53, p&lt;0.05, ω2 = 0.01). Reading performance decreased with increased dimming (F(2, 120) = 33.89, p&lt;0.001, ω2 = 0.08), but was not influenced by previous diming in the 100% condition. The results imply that the effect on pedestrians’ performance should be weighed against energy usage in the introduction of dynamic outdoor lighting.},
  author       = {Pedersen, Eja and Johansson, Maria},
  language     = {eng},
  publisher    = {11th Biennial Conference on Environmental Psychology, August 24 - 26 2015 in Gronningen, The Netherlands},
  title        = {Effects of dynamic street lighting on walking speed and reading perfomance : a full-scale laboratory study},
  year         = {2015},
}