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On a fast road, highway, or mountainous road, drivers are often unaware that their speed is too fast, causing many common car accidents.
Concept: By carving the letters on the antiglare plate edge, and using the “Principle of Persistence of Vision”, you will notice the SLOW warning on the antiglare plates when you speed too much, reminding you to slow down on time. But if your speed is normal, you will not see it.
Paste the Yellow reflective strips on the carved letters to make the letters “SLOW” more visible.