NAKHON SI THAMMARAT — Walailak University researchers have unveiled groundbreaking hybrid road studs that combine glow-in-the-dark technology with recycled glass powder, marking a significant advancement in road safety infrastructure.
The project, the first of its kind in southern Thailand, demonstrates a sustainable approach to nighttime road illumination.
Led by Associate Professor Dr. Thanongsak Imjai from the School of Engineering and Technology, an international research team comprising experts from Thailand, Indonesia, and the United Kingdom developed the innovative road markers.
The project, supported by Japan’s Mitsui Sumitomo Insurance Welfare Foundation, has already initiated patent proceedings.
The hybrid road studs harness solar energy during daylight hours and emit light for up to eight hours after dark. These dual-function markers also reflect vehicle headlights, providing enhanced visibility in challenging areas such as curves, intersections, and pedestrian crossings.
Testing has revealed impressive performance metrics, with the studs maintaining brightness levels of 150 mcd/m² after eight hours in darkness—surpassing conventional reflective materials. The innovation brings significant cost benefits, reducing production expenses by up to 30% through the incorporation of recycled glass powder.
Field trials within the university grounds have demonstrated remarkable durability, with the studs withstanding pressure from vehicles weighing over 30 tons while maintaining consistent luminosity across various weather conditions. The energy-independent design eliminates the need for electrical power or battery systems.
“Our goal is to expand this technology across Thailand, particularly in rural areas lacking proper street lighting,” Dr. Thanongsak said. The research team has already extended the application of their innovation to create luminescent benches and gravel from recycled materials.
The technology shows promise for international adoption, offering a sustainable solution to reduce road accidents globally. This development represents a significant step forward in combining environmental responsibility with public safety infrastructure.
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