Evaluating the impact of setting delineators in tunnels based on drivers’ visual characteristics

Autoři: Xueyan Han aff001;  Yang Shao aff001;  Binghong Pan aff001;  Peng Yu aff002;  Bin Li aff001
Působiště autorů: School of Highway, Chang’an University, Xi’an, Shaanxi, China aff001;  Northwest Branch of China Airport Construction Group Corporation, Xi’an, Shaanxi, China aff002
Vyšlo v časopise: PLoS ONE 14(12)
Kategorie: Research Article
doi: https://doi.org/10.1371/journal.pone.0225799


Poor visual conditions in tunnels can easily cause traffic accidents, and it is difficult for emergency services to reach these areas. As an economical and effective visual guiding device, delineators have attracted wide attention. Based on the actual alignment of the Qinling Mountain No.1, No.2 and No.3 tunnels of the G5 Expressway in Xi’an City (Shaanxi Province, China), this paper designs a simulation experiment. Through a simulator study and a questionnaire survey, this paper discusses how delineators affect drivers’ visual characteristics (including fixation area and pupil size) in different settings and with different road alignments. Twenty-five subjects participated in this research. The results show that setting delineators in tunnels can continuously guide drivers’ vision and attract their attention to focus on the pavement. Compared with setting only pavement delineators, setting wall delineators and pavement delineators together can provide better guiding effects and ensure driving safety in both straight and curved sections. In addition, when driving in tunnels equipped with delineators, especially tunnels with both wall delineators and pavement delineators, the participants exhibited a smaller pupil diameter and lower pupil diameter change rate. In terms of the relationship between pupil size and road alignment, the results indicated that regardless of what type of delineator was used, the drivers exhibited the smallest pupil size and lowest pupil change rate when driving on the straight section compared with the curved sections.

Klíčová slova:

Attention – Experimental design – Eye movements – Material fatigue – Radii – Roads – Traffic safety – Vision


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2019 Číslo 12
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