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Safety implications of co-locating road signs: a driving simulator investigation

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journal contribution
posted on 24.05.2017, 09:59 by Ashleigh Filtness, Gregoire S. Larue, Amy Schramm, Joshua Fuller, Andry Rakotonirainy, Clarissa Han, Peter Cairney
Background As road complexity increases the requirement for number of road signs also increases, although the amount of road side space does not. One practical strategy to address this is to present multiple road signs on the same gantry (sign co-location). However, there is very little research on the safety implications of this practice. Method 36 participants (mean age = 42.25 years, SD = 13.99, 18 females) completed three driving simulator scenarios, each scenario had a different sign co-location condition: no co-location, dual co-location and triple co-location. Each scenario presented similar information using direction signs, variable message signs and variable speed limit signs, under. Each drive included standard motorway driving (100 km/h speed zone) in free flow traffic and one emergency event where a lead vehicle suddenly braked. The scenario order was counterbalanced and the emergency event vehicle varied. Results Overall, there was no impact of co-locating signs on general driving performance. No significant difference was observed between conditions for reaction time and minimum headway in response to the emergency event. Participants were able to correctly choose their destination whether the signs were co-located or not. Discussion For the particular configuration of signs tested there is no evidence that co-location negatively impacts driving performance. However, there may be some implications for travel speed and the manner in which the emergency event is responded to. Future work should confirm the findings on real roads. These findings provided support for sign co-location as a practical and safe option for displaying multiple road signs in a confined area.

History

School

  • Design

Published in

Transportation Research Part F: Psychology and Behaviour

Volume

47

Pages

187–198

Citation

FILTNESS, A.J. ... et al, 2017. Safety implications of co-locating road signs: a driving simulator investigation. Transportation Research Part F: Traffic Psychology and Behaviour, 47, pp. 187–198.

Publisher

© Elsevier

Version

AM (Accepted Manuscript)

Publisher statement

This work is made available according to the conditions of the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International (CC BY-NC-ND 4.0) licence. Full details of this licence are available at: https://creativecommons.org/licenses/by-nc-nd/4.0/

Acceptance date

12/04/2017

Publication date

2017-05-17

Copyright date

2017

Notes

This paper was published in the journal Transportation Research Part F: Traffic Psychology and Behaviour and the definitive published version is available at https://doi.org/10.1016/j.trf.2017.04.007.

ISSN

1369-8478

Language

en

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