![]() ![]() ![]() Today, some newer versions of Cat’s Eyes are solar-powered, gathering energy that is then used to fuel an LED light (in place of the old retroflective glass eye). The Cat’s Eye is also retroflective, meaning: it redirects light back toward its source with minimum scattering, optimizing visibility for cars in motion. Meanwhile, a fixed rubber wiper clears off the glass when it is pushed under the road. The metal part of the housing protects the device while creating an audible sound when a car passes over, like Botts’ Dots. Cat’s Eye diagram by Ulfbastel (CC BY-SA 3.0) Each unit is complex and dynamic, its various materials engineered to serve a variety of clever functions. It features reflective glass spheres set inside a rubber and cast-iron housing. The Cat’s Eye was invented in 1933 by Percy Shaw of Boothtown, a suburb of Halifax, England. But these meanings - like reflector designs - vary from place to place.Ĭat’s Eyes in the U.K., Europe & Hong Kong Cat’s Eye on the road surface by Zoney (CC BY-SA 3.0) A few variants even feature reversible colors, conveying different messages based on direction of travel. Some colors cue police officers, emergency personnel or maintenance workers, showing them where they can find things like pull-offs, fire hydrants or stop valves. Raised pavement marker art in pedestrian tunnel by Jeffrey Beall (CC BY-ND 2.0) But there are other colors to (like blues and greens) that relay more information to those in the know. Raised pavement markers come in a variety of reflective colors, some of which (like white and yellow) have guessable meanings borrowed from painted road line conventions. ![]()
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