Effect of illuminance and spectrum on peripheral obstacle detection by pedestrians

Article English OPEN
Uttley, J. ; Fotios, S. ; Cheal, C. (2017)
  • Publisher: SAGE Publications

Obstacle detection is an important visual task for pedestrians. An experiment was carried out to measure the ability to detect peripheral obstacles under variations of illuminance and S/P ratio and with older and younger test participants. The LED array used in this work enabled S/P ratio to be varied whilst chromaticity was held constant. The tests employed a full scale model with dynamic fixation to better simulate pedestrian experience than in past work. Detection performance increased with illuminance, reaching a plateau at 2.0 lux. A higher S/P ratio improved obstacle detection but only at the lowest illuminance used in this study (0.2 lux). Older participants showed poorer obstacle detection performance than younger participants but again only at the lowest illuminance.
  • References (49)
    49 references, page 1 of 5

    1 Rubenstein LZ. Falls in older people: Epidemiology, risk factors and strategies for prevention. Age and Ageing 2006; 35(Suppl 2): 37-41.

    2 Faes MC, Reelicka MF, Joosten-Weyn Banninghab LW, de Giera M, Esselinkc RA, Olde Rikkerta MG. Qualitative study on the impact of falling in frail older persons and family caregivers: Foundations for an intervention to prevent falls. Aging and Mental Health 2010; 14: 834-842.

    3 Li W, Keegan THM, Sternfeld B, Sidney S, Quesenberry CP Jr, Kelsey JL. Outdoor falls among middle-aged and older adults: A neglected public health problem. American Journal of Public Health 2006; 96: 1192-1200.

    4 Caminada J, van Bommel W. New lighting considerations for residential areas. International Lighting Review 1980; 3: 69-75.

    5 Davoudian N, Raynham P. What do pedestrians look at at night? Lighting Research and Technology 2012; 44: 438-448.

    6 Patla AE, Vickers J. How far ahead do we look when required to step on specific locations in the travel path during locomotion? Experimental Brain Research 2003; 148: 133-138.

    7 Fotios S, Uttley J, Cheal C, Hara N. Using eyetracking to identify pedestrians' critical visual tasks. Part 1. Dual task approach. Lighting Research and Technology 2015; 47: 133-148.

    8 Fotios S, Uttley J, Yang B. Using eye-tracking to identify pedestrians' critical visual tasks. Part 2. Fixation on pedestrians. Lighting Research and Technology 2015; 47: 149-160.

    9 Bernhoft IM, Carstensen G. Preferences and behaviour of pedestrians and cyclists by age and gender. Transportation Research Part F 2008; 11: 83-95.

    10 Fotios S, Goodman T. Proposed UK guidance for lighting in residential roads. Lighting Research and Technology 2012; 44: 69-83.

  • Metrics
    views in OpenAIRE
    views in local repository
    downloads in local repository

    The information is available from the following content providers:

    From Number Of Views Number Of Downloads
    White Rose Research Online - IRUS-UK 0 7
Share - Bookmark