A Global Perspective for Sustainable Highway Tunnel Lighting Regulations: Greater Road Safety with a Lower Environmental Impact

Peña-García, Antonio; Nguyen, Thi Phuoc Lai · 2018 · OpenAlex-citations

DOI: 10.3390/ijerph15122658

archive: archived pipeline: cataloged verified

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Summary

This paper addresses the critical need for sustainable highway tunnel lighting regulations that balance traffic safety, environmental impact, and user well-being. The authors identify a significant gap in current regulatory frameworks, particularly in Europe, which prioritize safety metrics while largely ignoring sustainability and the psychological effects of lighting on drivers. With tunnel infrastructure expanding globally, especially in Asia, the authors argue that existing standards are outdated and fail to provide tools for reducing energy consumption without compromising safety or user comfort. The research aims to propose a comprehensive regulatory framework that integrates these three dimensions, positioning Asia as a potential leader in sustainable tunnel policy by learning from the weaknesses of European regulations. The study employs a review and analysis of existing international regulations, standards, and recommendations, including the CIE 88:2004 recommendation and various national guidelines from Europe and Asia. The authors examine the socio-environmental impacts of tunnel lighting, highlighting the high energy consumption and financial costs associated with traditional installations. They also analyze public perception and pro-environmental behavior, noting that current strategies are often designed without considering user feedback or psychological factors such as anxiety, claustrophobia, and the "black-hole" effect. The paper evaluates various energy-saving technologies, such as LED integration, intelligent control systems, and the use of natural light through pergolas or light-pipes, assessing their effectiveness and potential impact on driver behavior. Key findings reveal that current regulations are insufficiently focused on sustainability and user well-being. For instance, major standards like CIE 88:2004 devote minimal attention to energy efficiency measures. The authors demonstrate that while technical solutions like extending threshold zones with pergolas can save 30–50% in energy, they may negatively affect user perception by increasing tunnel length and inducing claustrophobia. Conversely, other designs, such as lateral columns, may be perceived more positively. The study emphasizes that the benefits of energy savings can be negated if drivers feel insecure or choose alternative routes due to poor lighting design. Furthermore, the lack of public consultation in regulatory processes is identified as a major flaw, leading to policies that do not adequately reflect user concerns or foster pro-environmental behavior. The significance of this research lies in its proposal for a new generation of environmental policies for tunnel lighting. The authors recommend a regulatory framework built on three pillars: prioritizing driver safety through visual performance metrics, introducing technical annexes for auxiliary installations that utilize sunlight, and incorporating user well-being and public perception into the design process. By integrating these elements, the paper argues that regulatory bodies can achieve greater road safety with a lower environmental impact. This approach is particularly relevant for Asian countries developing new infrastructure, offering a model for sustainable tunnel regulations that consider both technical efficiency and human factors, ultimately enhancing the sustainability and acceptability of tunnel lighting installations.

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• roadway lighting effects