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Study on Preparation of Long-Afterglow Luminescent Road-Marking Coatings and Simulation of Road Layout
Xiaowei Feng1,2, Bo Li1, Yan Zhang3
1School of Civil Engineering, Lanzhou Jiaotong University, Lanzhou 730070, China.
Abstract:
To improve night-time visibility of pavement markings, a long-afterglow road-marking coating was developed using strontium aluminate as the phosphorescent component. The influences of particle size (100-400 mesh), dosage (15-35 wt%), filler type, and coating thickness (200-600 μm) on optical behavior were systematically evaluated. The optimal formulation-200-mesh strontium aluminate at 30 wt%, titanium dioxides combined with ultrafine glass powder, and a thickness of 500 μm-achieved an initial brightness of 3.08 cd/m2 and maintained visible afterglow for more than 9 h. Durability tests confirmed satisfactory resistance to water, alkali, and abrasion, meeting the requirements of JTT 280-2022. Twinmotion simulations further demonstrated that when the coating brightness remains above 0.1 cd/m2, it provides effective visual guidance on unlit road sections, thereby enhancing night-time driving safety. This study verifies the feasibility of using long-afterglow coatings to improve road visibility and reduce night-time accident risks.
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