Conspicuity enhancing trims on turnout gear promote firefighters’ abilities to (1) reduce the possibility of struck-by accidents, (2) be located and recognized by others, and (3) coordinate their work with colleagues. Firefighting personal protective equipment (PPE) ensemble standards specify technical requirements for new visibility materials. A better understanding of the relation between laboratory measures of material properties and behavioral measures of conspicuity can be used to evaluate existing and newly developed turnout gear trim designs. The current paper examined how photometric luminance measures (%Y) of fluorescent trims on firefighter turnout gear relate to daytime conspicuity in two naturalistic field experiments (distance detection and identification, peripheral detection). The test samples consisted of lime yellow and orange-red fluorescent trims, including traditional solid trims and more recently developed segmented trims. We found overall strong relations between measured luminance and (1) observers’ detection of a firefighter from afar, and (2) observers’ identification of the color of a firefighter’s clothing in their peripheral view. A relation did not exist between %Y and peripheral detection. Additionally, the experiments demonstrated that traditional solid and newer segmented trim designs showed little conspicuity performance difference, with the only observed difference being in peripheral color identification. This suggests that the impact of luminance on conspicuity may be overestimated when evaluating a trim’s daytime performance. Our results further support that luminance measures alone are not sufficient to evaluate the conspicuity of turnout gear in naturalistic settings.

中文翻译：

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消防员白天可见度：修剪属性和醒目

醒目的装饰性的道岔装饰提高了消防员的能力，以（1）减少发生意外事故的可能性，（2）被他人发现并认可，（3）与同事协调工作。消防个人防护设备（PPE）集成标准规定了新的能见度材料的技术要求。对材料性能的实验室测量值与显着的行为测量值之间的关系的更好理解可用于评估现有和新开发的道岔齿轮装饰设计。本文在两个自然领域的实验（距离检测和识别，外围检测）中研究了消防员道岔装备上荧光装饰的光度亮度测量（％Y）与白天显眼性的关系。测试样品由石灰黄色和橙红色荧光装饰物组成，包括传统的实心装饰物和最近开发的分段装饰物。我们发现测得的亮度与（1）观察者远距离检测消防员，以及（2）观察者从其周边视野识别消防员衣服的颜色之间存在总体密切关系。％Y和外围设备检测之间不存在关系。此外，实验表明，传统的实体和较新的分段装饰设计几乎没有明显的性能差异，唯一观察到的差异是外围颜色识别。这表明在评估饰件的日间性能时，亮度对醒目性的影响可能被高估了。