On September 15th, the self-illumination project of Tunnel No.1 on the 205 Provincial Highway in Huzhou City, Zhejiang Province, was officially completed. This marks the city's first "Rainbow Tunnel" that operates without electricity, offering a more sustainable and eco-friendly solution for road maintenance and lighting.
The innovative "Rainbow Tunnel" features a new type of material that glows on its own without any electrical power. This special material is applied both on the tunnel ceiling and walls, creating a visually striking effect while also serving a practical purpose.
The light-emitting technology works through a cycle of LED electro-optic excitation, energy storage, and self-illumination. It can absorb natural light or artificial light from vehicles within just 5 to 15 minutes and then emit a soft glow—such as yellow, blue, or green—for up to 12 hours without any additional energy input. In addition to the glowing surface, the tunnel is equipped with self-illuminating signs that help guide drivers safely. Large color bars are also installed along the walls as visual warnings, improving visibility and reducing the risk of accidents.
Beyond its energy-saving benefits, this self-luminous technology also acts as an emergency lighting system. In case of power outages, fires, explosions, or collapses, the tunnel can continue to provide illumination for 12 hours, helping stranded individuals find their way to safety.
This groundbreaking project not only enhances road safety but also sets a new standard for sustainable infrastructure development. It's a great example of how innovation can be both functional and environmentally responsible.
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